An example of a non-biodegradable, or persistent, pollutant is the insecticide DDT which was used in the 1940s to kill mosquitoes. It accumulates in body tissues because it is not very soluble in ...

Increasing soil fertility with coal is a technique that has been used for thousands of years around the world, for example through slash-and-burn farming. DDT is an insecticide introduced in 1942.

Endangered wildlife are the proverbial canary in the coal mine and can show the early signs of pesticide contamination in our environment. For example, before anyone knew how poisonous DDT was to ...