Weapons of mass destruction didnt exist, the same way, Mass Extinction wont exist. We have lots of humans here living in this world, and of coruse those Environmentalists will say absurd things to make us worry abt environment and pull us to there side. It's all freacKIN progoganda... (although,, I DO deeply Care abt my environment)... and another note, human resoning is becoming more advanced day by day, we even have nuclear weapons to blow of those SANo Tino Asteriods.. Like hundreds of yrs back, ppl thought small pox cud destroy the world, but after the man invented the medicine, small pox became history.