Final answer:
The subject of this question is Biology. The use of DDT, a chlorinated hydrocarbon pesticide, is discussed in relation to its ecological impacts on bird populations as highlighted by Rachel Carson in the book 'Silent Spring'. Rachel Carson's book drew attention to the harmful effects of DDT and other chemical pesticides on the environment and human health.
Step-by-step explanation:
The subject of this question is Biology. The use of a chlorinated hydrocarbon pesticide, specifically DDT, is discussed in the context of its ecological impacts on bird populations as highlighted by Rachel Carson in the book 'Silent Spring'.
DDT is a type of persistent organic pollutant (POP) that biomagnifies in the food chain. This means that its concentration increases as it moves up the food chain, leading to harmful effects on apex consumers such as birds. DDT is believed to have caused declines in bird populations by thinning their eggshells, making reproduction impossible.
Rachel Carson's book 'Silent Spring' drew attention to the detrimental effects of DDT and other chemical pesticides on the environment and human health, and is considered a significant milestone in the American environmental movement.