Million times ago, the earth wasruled by dinosaurs. We know that they were numerous and we also know they became extinctbefore man lived on earth. Everyoneknows ‘extinct’ mean all the membersof aspecies are dead. Scientist say once, fewer than ten species became extinct each year. This is normal. But now, 1,000 of species became extincteach year. This is may be earth’s biggest danger. What the causes extinction? We maynever know what caused the dinosaurs to become extinct. But we do know most extinctions today are caused by man. Some animals became extinct due to hunting. Plants, too, are at risk of becoming extinct because of humans cutting woods, etc.

Everyone needs a home, and animals are no exception. Some animals become extinct because they lose their homes.So, we must save their homes and we must not make pollution. Pollution can cause extinctions, too. For example, why are fish dying? Because water pollution makes them sick. So, we must try to save them before they extinct.