Person as virus: what countries cause the most great damage to the nature

"Person mad". What threat to Earth is born by people? The mankind was settled on all planet, having thus made huge territories unsuitable for life. In the same way, as the virus which is built in DNA and transforms its structure, the person changes environment under own requirements. Now one regions of Earth are poisoned with industrial wastes, others are covered with funnels of explosions, as pockmarks. That without having noticed, we became a terrible virus for own planet. What threat to Earth is born by people? Why we behave, how a parasite on a body of own planet? What countries...