Dangerous pesticides and ddt
The biggest scare about pesticides came as a result of a chemical called DDT. This pesticides was invented after world war II and was used kill insects that carried the disease,malaria. In the united states,the insides of people's homes were sprayed with DDT. (E) by the 1960s,pesticides use had become common. (F) they argued that reliance on pesticides was causing many insects to become resistant to chemicals. (G) instead of DDT decreasing the amount of insects carrying malaria,their numbers soared to higher and higher levels. (H) soon,19 species of mosquitoes worldwide were resistant to DDT.