Question

what would happen if there are no humans on earth

Answer 1

Earth would be some wild planet with a huge amount of vegetation, just like a huge rainforest. Ozone holes may not exist, and there wouldn't be cure for viruses either. Earth might become a giant parasite feeding upon itself. Creepy, isn't it?

Answer 2

Hey.. hope my answer helps you..

If there are no humans on earth then there shall be no "earth".

This can be justified in a better way. Humans intake the oxygen trees produce and give trees the carbondioxide for their photosynthesis. If humans are not there then photosynthesis will come to an end and ulmately trees will also die. This brings the ecology to an end. Because of ecology hamper, the soil layers shall degrade ( as tree roots hold soil and prevent soil erosion). Then once the soil layer is removed, the underground water is exposed; ultimately even that dries up. Thus without humans, SUBLAYERS, ATMOSPHERE, AND OTHER SPECIES WOULD COLLAPSE..