E07 | Earth from above | The Earth does not belong to Man, Man belongs to the Earth - Part 1

We end up at Yellowstone National Park in the United States, it is located in the first natural park created in the world. In Peru, the Amazon rainforest is suffering from massive deforestation. The desert on Beijing's doorstep is regularly hit by sandstorms. Some experts predict that the Chinese capital could be threatened by deserts within a hundred years. In Montana, American agricultural productivity has an ecological and human cost. Engineer Marc Dufumier explains how mechanisation is undermining the natural balance. In Brazil, agrofuels have made it possible to reduce dependence on oil, cut urban air pollution and even limit greenhouse gas emissions. In Los Angeles, human activities have disrupted the greenhouse effect and exacerbated it. Today, the Earth is heating up.