said by mazilo :

And more expose to an accumulation of such microwave radiations that will perhaps cause human cells to mutate into other cells, including but not limited to cancer cells. Thousands years from now, perhaps this planet will be inhibited with mutated creatures and they will still call them a human species. Those who live in jungles that are not affected by these microwaves (absorbed by tree leaves) remain the same and will be treated as alien species.