Some countries or regions struggle with trade deficits or trade surpluses, which cause worries to their partners. Eurostat publishes regularly the latest trade figures for the EU with external partners. The EU as a whole has a trade surplus in September in 2024 of € 12 billion. From January to September in 2024 the surplus accrues to 140 billion already. Overall, this is a rather sunny picture of EU trade. As we import raw materials and fossil energy mainly, the rest of the world is largely appreciating what we do with the imports, at least in an economic sense, environmental concerns tend to be neglected in such considerations.
The import statistics and figures do not capture the contribution of the sun to our energy balance sheets. We import energy from the sun almost on a daily basis and our trade statistics to not capture this, despite their huge impact on production and the fossil energy trade imbalance we report each month. Imported energy, the largest negative position in our sunny trade balance, in the EU amounts to € 20 billion per month. Harvesting more wind and solar energy as well as geothermal sources and energy storage require huge investments, but millions of Europeans are willing to contribute to this effort. With rising protectionism we should act now to avoid years of structural trade deficits in the coming years. There should already be more sun in the still sunny trade balance. To keep it that way more sunny trade will do the trick.
(Image from Eurostat, 2024-11-18, Euro area trade balance by product group in billions of €, original states in %, retrieved 2024-11-29)
Birds again
There are many ways to have more birds again in inner cities. Less pollution and poison are part of the solution. Second, increase the food available to birds. Some plants or vegetation is more suited than the other one. Combined with the question of cooling houses in summer and more isolation in autumn and winter, the greening of facades in cities has a simple effect to provide hiding, nesting and feeding spaces for birds. Birds will discover this vegetation as their natural habitat offering relatively safe shelter and food. It is an incredibly simple way to catch 22. Your new shelter is selective in the choice of birds that it will house. Singing birds seem to value the places most. Other predators may follow. At least in late autumn and early winter the energy rich power food is a welcome addition of the diet. Nesting in spring and summer might be another option to have more birds again. We shall need many very small steps again to keep biodiversity or bring back some of it. Birds again is a small initiative.
On Uncertainty
Uncertainty is a catchword for all sorts of undetermined occurrences, which we might have to confront. We associate economic uncertainty with the difficulty to forecast or predict the economic evolution of key indicators like inflation, GDP, CO2-emissions, energy and raw materials’ prices and availability. Even factors like increases in greed of CEOs, psychological factors like insecurity about external or internal conflicts drive these macroeconomic indicators. Micro-level features of your own stage or evolution of the life course have an impact on and will be affected by uncertainty. Employment, housing, family, or household composition are subject to high levels of uncertainty. These micro- and macro- level factors are, of course, not limited to the domain of economic phenomena. Most recently, political uncertainty has reentered the international and national sphere with the re-election of Donald Trump as president of the United States. This election outcome of the U.S. is perceived by many as increasing the overall uncertainty due to the unpredictability of political decisions and even previous treaties with the U.S. or where the U.S. is a major partner in the agreement. These economic and political uncertainties are accompanied with a perception of growing legal uncertainty even in very personal spheres of life. Last, but not least uncertainty about climate changes like heating up of the planet and more devastating flooding and droughts contribute to increased uncertainty about future developments and the need to initiate adjustment processes and the financing of those.
The individual and societal ways to cope with increased uncertainty are one of the major economic, political, legal and social issues for the coming years. The answers are likely to be found in mutual, cooperative and risk sharing arrangements. The social in society will be a major part of dealing with increased uncertainty. 
(Image: Extrait of Paul Klee, Seiltänzer 1923)
Paris Vision
You got to have a vision in urban planning. Long term visions are best to then realize them step by step. The center of Paris has been restructured since the time of Haussmann at several places. The previous commercial center of Paris with « Les Halles » and the building of the commodities exchange « La Bourse de Commerce « have been turned into a pedestrian area long ago. This axis runs nowadays from the home of the Pinault Collection to Les Halles almost to the Centre Pompidou (in the background of the image below). Whereas Les Halles is usually very popular and crowded with people the art museums are a bit less busy. Walking around in the area is offering amenities for people of all walks of life. It is an area, better called a pedestrian boulevard, where the wealthy and the poor may meet or at least pass by. Social urban planning is in high need to be considered as a vision not only for Paris, but many places and cities again. Inclusive societies also begin with a rather simple vision of togetherness putting people first.
Move Tech
First we teach robots how to move. Next, they teach us how to move and motivate us to do more. This is not only for the elderly persons to imitate the moves and talk to AI systems, but children too will have fun and learn new tricks from robots rather than old dogs. Learning languages with an AI system is well advanced. Soon we shall walk with our artificial friend around cities and have a perfect tourist guide with us. Imagine walking in the countryside with your robot explaining you the flowers and herbs next to you. These brave new worlds are not too far off and it is up to us to be open to accept or dismiss these applications. Coaches using ball throwing machines or robots have managed to lead pupils to higher levels of practice faster than others. Motivation through move technology has undeniable advantages. 
Ener Tech
The future energy lab in Berlin proposes valuable advice and guidlines for the „prosumer“ revolution in energy technology. From the own or home production of energy, the sharing of investments and infrastructure to the distribution network and finally consumption, the whole life cycle of energy is treated with a concern for environmental and financial sustainability Sharing is the way forward and many solutions build on this basic idea to move beyond the individualistic approach and fossil fuels cheap in the short term, but more expensive to society in the medium to long term. As most solutions make use of digital tools the issue of cyber security has to be a concern right from the beginning or even the planning phase. Joint production and consumption rely on people and communities reaching compromises. However, wholesale resourcing and averaging over households allows cost savings. The technology is available already, the skilled people to implement these solutions are currently the bottleneck. DIY will have to bridge the gap as neighbors learn from neighbors as yet another form of community building and engagement. (Image gamification of community decision making, SCCON Berlin 2024)
Mobi Tech
There is much more to mobility and technology than new cars and bicycles. Innovative infrastructure provided by new public services allows new forms of mobility technology to strive. Charging points across a country are crucial to ensure smooth and smart mobility for example with e-cars and e-bikes. Software guides us to next or cheapest charging point in the surroundings. Public services provide the basic data on this and need trustworthy updating and repair of the infrastructure to avoid frustrations. Navigation systems need up-to-date info on areas with restricted mobility due to high emissions (diesel) or illegal parking of shared bikes and rollers to avoid a banning of share options in inner cities. Data allow the guidance of traffic and combinations of different modes of transport. Mobility tech is nowadays a largely data driven process and public services provide important basic services and information for innovation and reduction of emissions in the field of multimodal mobility.
Water Quality
Obviously, water is not just an issue of quantity, but also quality. The availability of sufficient quantities of water in a region depends on rain, its storage, and the use of these water resources. The quality of water is a subsidiary issue, as lack of inflow causes concentrations of nuisance in water to rise. Global warming will most likely intensity the concern for not only the quantity, but also the quality of water.
Public services are in charge to sample and monitor levels of water quality for consumers. Independent of public, private or public private partnerships in this field there is a need to check from time to time the quality of water. Public institutions do a great job in monitoring water quality, but as science progresses there are new sources of pollution that enter the already complex analysis of water quality. New chemicals and remains of medical or pharmaceutical analyses have been retrieved from water and, sometimes, they have reached critical or unhealthy levels.
More detailed monitoring is necessary and new digital tools allow to improve just this type of monitoring to inform policy makers on shifting patterns.
A project of that type “Urban Green Eye”, for example, allows to monitor the artificialization of previous vegetation to show up on satellite images of Germany. Independent groups, citizens or communities might find it useful to use their own sampling and testing to guard against abuses or dysfunctional public monitoring systems. Start-ups like “Hydroguard” offer services to support activists, communities or public services in their own efforts to ensure water quality. 
Water as a Service
Most of us are happy to turn on the water tap and enjoy the bubbles of fresh water. In other parts of the world this is considered a luxury and precious good. Public infrastructure takes care of water supply and treats waste water. We hardly even notice. This is changing in many regions of Europe now and Berlin and its surroundings are a good example of the challenges of water as a service. We need to sharpen our awareness that, yes, climate change again, has changed the priorities of water supply. Some East German regions face already a water supply shortage due to lack of rain water and adequate measures to store rather than evacuate rain fall. The German weather service (DWD) offers not only the info on rain fall, but also several indicators on soil humidity from 10cm to 200cm under the surface.
These measures are important for crops and agriculture, but also for trees and vegetation in general. The droughts of the last years show a lack of humidity in large parts of East Germany.
This is the starting point for the “citizen science” project in the region of Brandenburg. The “Wassermeisterei” brings together people interested in water management to monitor soil humidity with a shared infrastructure and citizen enthusiasts to raise awareness and draw conclusions on the local preconditions for agriculture and forestry. Knowing about the evolution of water availability over time allows to make more informed judgements about the need and potential of a continuous and improved “water as a service”. The presentation of the project on the e-government fair was a reminder to take water more seriously and to value this crucial resource with more respect. 
Risk Takers
We are all risk takers of one form or the another. Those of us who ride motorbikes or enjoy rock climbing have an above average taste for risk taking. Since the publication of „The risk society“ we are aware that collectively as a society we have taken on additional risks like nuclear energy, atomic weapons or the risk associated with silent climate change with the persistent reliance on fossil fuels to a large extent. Holman W. Jenkins (WSJ) has added an additional perspective on risk takers which originates from government policies to encourage building homes in places subject to high risks of flooding. Several policies come to mind that encourage individuals to take high risks and construct and repair buildings in flood prone areas. Government grants, insurance policies and relocation subsidies are at issue here. Regulations like driving licenses try to build on competences to ensure „more rational risk taking“ in people. Teaching about nutrition might alleviate the obesity pandemic as much as awareness of an active lifestyle can avoid a large number of cardiovascular diseases. Risk taking should be to a large extent an individual’s choice with the consequence to live up to the consequences of the risks taken also more an individual’s responsibility. Collective solutions are a powerful way to encourage additional risk taking. The consequences of those well-defined solutions have to be funded collectively as well. A society-wide discussion and voting process on such issues has to be organized and updated from time to time. (Image Skateboard high and long jumps Brussels 2024-10)
Patient Capital
There is something cultural about capital. Different cultures use different narratives when they commonly talk about capital. In Western capitalist societies it is common practice to cite “capital is a fugitive dear”, meaning that people who command sizeable amounts of capital tend to flee places once they become to agitated, especially by politicians. The Eastern narrative surrounding capital is more focused on “patient capital”. The newspaper “China Daily” has more than 6.000 entries referring to this term. On 2024-9-26 (p.9) the Japenese economist Kazuyuki Motohashi praised the Japanese economic system and its specific form of patient capitalism as based on” long-term, stable investment, which enables companies to achieve sustainable growth in the long run”. The Chinese economy suffers as Western capitalism from excessive focus on short-term profit seeking and this causes huge market flucturations shifting quickly from shortages to oversupply and back again. Short-term rent seeking is driving whole industries into fluctuations that are hard to attenuate through other economic (fiscal and monetary) as well as labour market policies (training, re-locations, internal migration).
It is interesting to witness that recently in Germany an example of a bank that had benefited from a patient capital approach of the German government for more than a decade (Commerzbank) is now prone to a bit of a hostile takeover from another bank probably more interested in the short-term rent-seeking. After all, banking and the varieties of capitalism approach highlight that at the very heart of economic rationale there remains a little bit of a cultural twist to understand what is happening in international economics and competition.(Image: Musée Rodin Paris 2024, Le Penseur”)
freight transport
The transport of goods is an important and crucial economic sector to achieve reductions in CO2 emissions. According to statistics from Eurostat Total Road Freight Transportation increased by an annual 0.6% percent between 2019 and 2023. Considering the slack during the Covid-19 economic restrictions this is a remarkable development. Most people agree that more freight on rail could allow a much better performance concerning CO2 emissions. This needs substantial investments in infrastructure and intelligent solutions for optimised and accessible freight loading points. The logistics of the last mile for delivery has found many innovative solutions with battery-supported e-vehicles. The tough issue seems to be the production of e-lorries at competitive prices to the Diesel-engines. Considering the legal obligations to take breaks to ensure sufficient concentration of lorry drivers, the battery charging infrastructure has to be planned accordingly. Ports and airports a certainly key infrastructure for freight transport as well. Industry has additional key locations with high freight frequencies and tonne-kilometres. Eurostat data show that EU-wide empty running vehicles account for about 22%. Scope for optimization is, therefore, a continuous challenge for the sector.
E-transportation is high on the agenda in the sector and production of e-lorries a big challenge. There a many positive signs that the sector has taken up the challenge as there are an estimated 100.000 € per year cost advantage of battery-driven lorries compared to traditional ones (Le Monde 2024-9-24 p.16). This is simply a long-term survival issue for the sector. Smart transport solutions add to the productivity potential of the sector in combination with electrification. 
Buzzing free
It is always a chance to be in a city that bans cars for some time from streets and bicycles and pedestrians can walk freely in the city. On September 22nd 2024 this is the case in Brussels. In addition, the public transport system allows people to buzz around the city free of charge. Of course this is an invitation to get to know areas of the city where you normally don’t take the time to visit or mix with people. The police used the time to teach children how to cycle in a city in all security and respecting basic rules despite the enthusiasm for speed or going round in circles. Unfortunately, this happens only one Sunday out of 52 in a year. It is just amazing how the feeling of safety on the road changes again. The level of noise and pollution drops to levels of the countryside. Buses and trams pass the city easily and most people get around faster than they do on other days of the year. It is a bit like a coordinated health intervention for the stressed urban survivors. This experience is a modest reminder of how nice it was in Paris during the Olympic Games 2024 when prioritizing mobility beyond cars haa been effectively implemented for several weeks.
Nature Spectrum
When it comes to colors, nature has shown us the way forward for a long time. Before mankind „invented“ bionics, nature had opened up the full spectrum of colors. It took us thousands of years to understand how to recreate the colors of something technically rather simple like the rainbow. The colors continue to impress us independent of our cultural background. More interesting than, maybe the Atomium in Brussels, is the almost daily reproduction of a rainbow in a park in Brussels (park Bois de la Cambre). All it needs is a sunny day, water fountains and the right angle of observation. It is magic, but still simple science. Enjoy.
Sufficient
What do we mean by sufficient? Sufficient of what? French philosophers currently debate the topic under the French notion of sobriété (sobriety). They give as English translation sufficiency, but the notions do not match exactly in the usual understanding of the words. In breaking with the economic rationale of more is always better, the idea of having sufficient food, room to live in or social contacts to not feel lonely, the notion of sufficiency hints towards a rethinking of our customary lifestyles. How many trousers are sufficient? Well, as with shoes there might be gender differences or more generally interpersonal differences or preferences to come to the conclusion of how many is sufficient. If we bring in the notion of sobriety in additional, we allow another social and/or ecological dimension. This may redefine what is sufficient based on judgments how much our planet can handle (emissions) and distributional judgments. The western lifestyle of the last 100 years is no role model for other countries to follow. It is urgent to rethink our growth based economic model to develop new socially viable ways of production and consumption. It seems to be a necessary condition to reconsider the notion of wellbeing and wealth from a sufficiency perspective. It is a sobering thought, isn‘t it?
Desertification
Since 2018 we have evidence of the progression of desertification into some Member States of the European Union. The mediterranean countries are concerned as well as regions of Bulgaria and Romania near the Black Sea. There are multiple sources of desertification. The 3 main reasons of desertification are soil erosion, loss of soil fertility and loss of natural and desirable vegetation besides wind or water erosion and salinization. We also know that man-made climate change is at the root of the past and recent problems. The statistical indicators of land degradation are collected by the European Joint Research Centre and these data show a dismal picture of land degradation in general and desertification as part of this process. A study by Ilea et al. published in Nature 2024 projects an intensification of extreme weather in the coming years. Higher temperatures will most likely enhance desertification and more frequent flooding will contribute to more soil erosion as well. It is a rather strange process that we know we are creating severe problems for some regions which endanger the roots of their existence and yet we do not act upon those undeniable facts (United Nations SDGs list). The amount and dynamics of land deterioration put the global South under severe pressure, but also the wealthy parts of the Mediterranean basin will be affected. It about time to acknowledge that we are all part of the global changes and challenges. (Image palm tree in Paris, Jardin du Luxembourg, 2024)
Lost Objects
Project yourself into the future more than a hundred years from today, maybe even more than a thousand years from today. Some archaeologists will work on the planet earth to uncover the story behind the disappearance of the once very advanced species of homo erectus. They start drilling near some of the mystical sites of this civilization, the cities where mass celebrations were held called Olympic Games. These archaeologists use huge drilling machines to take samples at previous Olympic sites and uncover the remains of the thought to be modern civilizations on earth. Amongst all these samples they find all sorts of artifacts and layers left over. Plastics and metal structures appear in the samples as well as other forms of „artificializations“, transformations of earth’s principal „natural“ raw materials. The inhabitants of earth apparently lost or destroyed the planet‘s capabilities of CO2 storage and eventually became extinct. After fighting for survival on another planet the archeological expedition on earth saved this block of the remains of a doomed civilization. All this is pure science fiction, yet the specimen sample is exposed on the roof of the futuristic Fondation Louis Vuitton building near the Jardin d‘Acclimatation in Neuilly sur Seine. (Image of „Where the slaves live“ of Adrian Villar Rochas, 2014).
Paris Trees
Preparing metropolitan cities like Paris for the heating up of the globe due to climate change is a huge task. As early as 2020 Paris started an ambitious greening program. 170.000 new trees by 2026 in a densely populated city is a steep challenge. With 114.000 trees planted by 2024 as the Olympic athletes and spectators gathered in Paris the city is right on track. The 2 parks “bois de Boulogne et bois de Vincennes” have jointly 25.000 new or renewed trees. The cemeteries, for example “Père Lachaise” has received new cooling trees as well. Most trees, however, were planted along the notoriously hot and overcrowded “périphérique” with 50.000. Only with the use of a Colbert-like planning exercise and rigorous implementation against even some initial resistance, it is possible to achieve this result and the ultimate objective. Visitors of the Olympic Games already experienced the differences during the summer of 2024. Detailed planning by means of a “Bilan par arrondissement” facilitates monitoring of progress. Publishing the information is part of the communication strategy to keep citizens informed and engaged in this silent transformation for the benefit of inhabitants and visitors. (Image City of Paris webpage 2024)
Paris Experiment
The Olympic Games 2024 were prepared years ago. Already the application procedures to prepare “un dossier” has to bring in lots of ideas and imagination what is desirable and feasible. Paris opted for a celebration of sustainability in a city proud of its medieval heritage and the Haussmann tradition of radical transformations of a city with large boulevards and representative buildings. From the “Arc de Triomphe” the major axes of communication between “arrondissements” become visible. 100 years ago the city had already been transformed according to this master plan. At that time sanitation of a city meant different things than today. The invasion of inner cities by Diesel-driven cars made life unhealthy again. Now, the Olympics gave reasons to restrict cars and lorries passing the inner city and the great boulevards. More tourists need more space and shall keep a much better memory of how pleasant Paris was during the Olympic Games. This could be a game changer for urban development in general. The proportion of pedestrians versus cars has to be shifted in favor of the walking population for many reasons. Tourists will flock to the city, if the overall and shopping experiences are great. Back to the future sounds crazy, but it has an interesting flavor to it for urban renewal and residents as well. (Image Paris 2024-8, b/w color filter applied, enlarge to see vasque)
Green Olympics
Paris 2024 has won a medal for the Green Olympics. Sustainable building of Olympic sites is a crucial element in this struggle for saving resources. Just as important is the CO2 footprint of the transport within the city if you cannot prevent thousands of people from flying to the venues. Public transport in Paris used the occasion to improve its services considerably. The restrictions to cars driving around in the inner city also for security reasons made the Olympic experience for Paris a healthy walking experience for all. The view from the “Arc de Triomphe” during the Olympics in Paris is even more pleasant and relaxed as the noisy and polluting traffic is reduced to minimal levels. You were able to grasp the feeling what inner cities could be like if people were the overriding concern of cities rather than circulation of automotive vehicles. Redressing this balance in favor of people living, working and visiting is overdue and we all know this. The city of Paris used the occasion to demonstrate that another way or compromise is possible. This is also a way to write history and create unforgettable moments. Paris discusses already what to keep from the Olympics for longer. Maybe the vasque, maybe the cleaning crews. New Metro lines, of course. Why not the different traffic and mobility patterns? It’s well worth a lasting Green Olympic medal.
People’s Olympic
The Olympic games have an elite touch attached to them. The selection beforehand is though and during the games another selection has to take place. After all there are only 3 medals to be awarded per competition and the runners up receive much less attention. That’s what the Olympic fame is built upon. To get more people involved in the games Paris 2024. had started the running and arrival of the flame weeks before the game so that public attention and awareness that people are part of the game as well. As spectators participation is feasible but rather expensive and out of reach for many supporters or locals. Hence, criticism of this kind is as old as the Olympic idea. Paris 2024 has tried several ways to mitigate the selectivity. Even distribution of tickets for free to visit performances has been widely spread. Most people will watch on their couch even if you live nearby. Places in Roman “panem et circenses” games in amphitheaters were scarce as well and reserved for citizens. Paris has built a brand new train station and lines to the stadium and the Olympic village. ( Image below RER Terminal, Saint Denis) on the outskirts of Paris. This will serve after the Games for many years to come. Inclusion of people has many facets.
Olympic Celebrating
Paris 2024 gives lots of reasons to celebrate athletes and teams. France has already achieved a large number of medals and shops in Paris start to decorate their windows with their emotional expressions of various forms. Merchandising seems to work well and some shops add a personal touch to special heroes. Walking the marvelous streets of Paris from one monument to the next is a pleasure as the streets are surprisingly empty and many are closed for cars and lorries. Hence, walking in Paris is a rather healthy exercise at this special moment in time. It is a great way to welcome all nations to Paris and allow a rather stressless visit of the city and its tourist attractions. Riding bicycles and buses becomes a pleasure too as roads are rather empty and circulating around the city is much easier than at any time before and probably after as well. Thanks for the great experience and the welcoming atmosphere.
Park Le Nôtre
Landscapes and gardens maybe occasions of splendid design. Paper and pencil designs or oil on canvas have left us with great imaginations of gardens as well as parks. The garden designer Le Nôtre in France has left us unforgettable, fantastic landscapes that have been originally realized 300 years ago, but has still many people you are impressed when looking or walking in them. One of the earliest projects is to be admired in Meaux just next to the cathedral. The design of the “jardin Bossuet” is attributed to Le Nôtre who later designed the park in the “Chateaux Vaux-le-Vicomte”. These accomplishments earn him the invitation also to design the gardens of Versailles. As part of the Paris 2024 Olympics the whole world was able to watch some of the horse mounted competitions there. Architecture leaves us impressions over centuries. Gardens are the most natural part of this cultural heritage.
Olympic Village
The newly built Olympic Village in Seine Saint Denis consists of 82 buildings and offers 3000 appartements. With up-to-date cooling and heating technology from a nearby geothermal source the eco friendliness is assured as well. Inclusive accessibility allows for games for all and the needs of an aging society. The price level of renting apartments remains a difficult to solve issue as demand will exceed supply for years to come. Universal accessibility is a necessary precondition to host the Paralympic games also in 2024. Historic sites are notoriously difficult to adapt to aging societies and inclusive approaches. However, the adaptation takes a large step towards the realization of inclusiveness of extraordinary people. The care for environmental sustainability has been honored as well. The exhibition in the Museum of the city of Saint Denis at the outskirts of Paris demonstrates the significant size of the urban renewal project. The socioeconomic and environmental benefits are evident and will give a push towards this previously deprived suburb. A lot remains to be done but the new trajectory for urban development is already put on track. The oblivious factories and enterprises give way for urban renewal of housing for people with easy access to the Paris city centers as well. (Source of Image)
Paris Parks
There are many splendid parks in Paris. They all have an important function to cool the city in summer. Good for exercise and walking all year round as well. The latest addition is the “parc suspendu” between Gare de l’Est and Gare du Nord (Jardin Marielle-Franco).
Many travellers pass there from one station to the next. The creation of this space is rather tricky and avoids the building of yet another shopping mall for tourists. The cleaning of the park and the growing of the grapes are a challenge for those in charge.
This park is an interesting melting pot of very diverse social groups. The sportspersons and walkers confront “la misère du monde” of people entering to sleep rough in the park or attempt to do or deal drugs there. Paris is fighting back for its public spaces and devotes resources to these purposes.
The “Cru bourgeois” is also challenged in this area. Living together accepting the unresolved social problems and to confront them rather than to ignore them, this creates the “metropolitan experience”. Parks in and around Paris build on a great historic tradition. “Le Nôtre” stands for the creation of Parks that were copied across the world.
The cleaning up of Paris for the Olympic games 2024 is a tremendous effort. The swimming in the Seine (rather than singing in the rain) is probably the steepest challenge of all efforts, even if in retrospect the opening ceremony happened during heavy rain.
Parks need water, rainwater is best. Hence, the alimentation of parks from sources far away from them is part of urban and landscape planning.
(Image: Jardin Marielle-Franco in Paris between Gare de l’Est and Gare du Nord)
