Background Knowlege were kept and spread a powerful chemical called DDT. It was part of a project to control mosquitoes PRI Many songbirds and harmless Rachel insects were killed by the DDT. Rachel Carson and other scientists Carson were very concerned about the harmful effects of ddt and other Rachel Carson's most famous book insect-killing chemicals called Silent Spring, was published pesticides. After World War TwO in 1962. The idea for the book these poisonous chemicals were developed from a suggestion from a widely used to control insects friend. Rachel's friend owned a Pesticides were sprayed almost protected area for birds. An airplane everywhere including agricultural had flown over the area where the fields and communities DDT and birds other pesticides had becomeBackground Knowlege ▪ Rachel Carson's most famous book, Silent Spring, was published in1962. The idea for the book developed from a suggestion from a friend. Rachel's friend owned a protected area for birds. An airplane had flown over the area where the birds ▪ were kept and spread a powerful chemical called DDT. It was part of a project to control mosquitoes. Many songbirds and harmless insects were killed by the DDT. Rachel Carson and other scientists were very concerned about the harmful effects of DDT and other insect-killing chemicals called pesticides. After World War Two, these poisonous chemicals were widely used to control insects. Pesticides were sprayed almost everywhere including agricultural fields and communities. DDT and other pesticides had become