Insecticides such as DDT have long been used to combat the scourge of malaria in the developing world. But with the disease parasite becoming increasingly adept at resisting the chemical onslaught, some countries are achieving striking success by eliminating the environmental conditions that give rise to malarial mosquitoes.
Across western North America, huge tracts of forest are
dying off at an extraordinary rate, mostly because of outbreaks of insects.
Scientists are now seeing such forest die-offs around the world and are linking
them to changes in climate.
With global warming pushing some animals and plants to the brink of extinction, conservation biologists are now saying that the only way to save some species may be to move them.