The natural heart of New York has never stopped beating. The naturalists of the city take us to feel its pulse. We will discover how nature finds her way NYC. It’s incredible: birds continue to migrate, coyotes are moving in to each of the city’s five boroughs. Fish are returning to the Hudson!

Paris delights visitors, but It is one of the world’s most densely populated cities and one of its least green. The centre of Paris is imploding with only 5% of greenspace per inhabitant. The scientific community would like to get Paris to go green. Can Nature still find a place in Paris?

At first glance, it’s the most beautiful city in the world: the perfect encounter between the hand of Man and the work of Nature, Rio. Behind the postcard views, though, it’s no paradise, Nature is suffering. Rio has an ecological crisis. What will transform this city? Can Rio get back to Nature ?

Tokyo: it's a giant city which never stops growing. It has destroyed its natural spaces and has created its own weather. With 13 million inhabitants, Tokyo is an amalgam of condensed urban worlds. And yet, Tokyo retains deep spiritual bonds that lead it back to Nature and green spaces...