the world health organization began a ddt spraying program which virtually eliminated mararia.But other things began to happen. besides killing mosquitoes, the DDT killed other insects that in the houses, such as files and cockroaches. These insects were the favorite food of gackos (small lizards).and so when the geckos ate the dead insect, they died from DDT poisonin. Similarly, the house cats ate the dead geckos and cockroaches, and they too died from the DDT poisoning. As a result ., the rat population rose sharply, and the human population of borneo began to die from a type of plague carried by fleas on the rats.in order to deal with the emergency,thousands of cats were parachuted into the island,in what was called 'operation cat drop