THERE HAVE BEEN five mass extinction events in the Earth's history,the last time it was ,65 million years ago, the dinosaurs vanished ,Now again there is a danger of extinction due to human . Men drives more animals and plants to extinction.Men destroys the life support systems that all species depend on including humans. PATHS TO EXTINCTION . Growing population - The more people there are the less space there is for animals. Habitat destruction . Pollution . Hunting and fishing . Alien invaders .-When humans bring align animals or plant into a new habitat, the native species often can't compete or will catch diseases they can't fight. Climate change .-Global warming is attacking animals and plants in number of ways - from melting the sea ice that polar bear need for hunting to bringing tropical rain