The banning of the pesticide DDT in 1972 was enormously helpful.

The pesticide DDT depressed their numbers further in the 20th century.

Bald eagles are listed as endangered and were nearly driven into extinction during the 1960's because of the effects of the pesticide DDT.

By the 1960's, falcons had vanished here and across most of the nation, victims of the pesticide DDT, now banned.

The population of peregrine falcons has made a well-publicized recovery since the pesticide DDT was banned in 1972.

Only then will we avoid a repeat of such disasters as asbestos, the pesticide DDT and lead paint.

The US ban on the pesticide DDT takes effect.

One likely source of these pollutants is the use of the pesticide DDT by developing nations in southern Asia.

The cause of this decline is unknown but the pesticide DDT is often listed as a primary cause.

Further decline came in the 1940s due to the widespread use of the pesticide DDT.