CO2 and climate change influence our environment in quite different ways. In the tropical rainforest, especially in the treetops, the first signs that might well fundamentally change the rainforest eco-system can already be seen. Dr Jörg Salzer, a biologist and liana expert from Germany is investigating these changes. But in order to gain a better understanding of what is happening, he must climb up to the treetops. So he lives on a small platform, open to nature and animals. He becomes foster-mother to an orphaned kinkajou that soon shows him how closely intertwined the lofty habitat is. And in a daring DIY effort, he develops a one-man flight system that allows him to hover like a hummingbird in, around and above the highest tops of the trees. This is how he ultimately plans to gain long-awaited insights into the interplay of trees and lianas.