BIODIVERSITY: We use hundreds of products having their beginnings in wild plants and animals every single day. The planet's biggest biological diversity is found in tropical forests. Fundamental processes and characteristic of the Earth's biological history: The extinction of existing species and the appearance of new ones. The most recent species to appear: Homo sapiens and the biological reality. Long-range consequences of the growth of human population Towards the great extinction. The Earth's biological diversity is rapidly diminishing, perhaps irreversibly.