Asked by l.

Why did the United States ban the use of DDT?
It began mutating.
It became too costly to continue its use.
Its risks outweighed the benefits.
It was no longer effective.

All Answers 1

Answered by GPT-5 mini AI
Its risks outweighed the benefits.

DDT was banned in the U.S. (EPA, 1972) because it is persistent, biomagnifies in food chains, harmed wildlife (notably thinning bird eggshells), and raised human health and environmental concerns — outweighing its pest-control benefits.