DDT stands for Dichlorodiphenyl Trichloroethane.DDT was used in theas a pesticide Second World War to protect the troops and civilians from the spread of malaria and other diseases. Today DDT is used for insect control.
But DDT harms the environment and the human health.
There is an evidence that links DDT with severe declines in bald eagle populations due to thinning eggshells.
So, DDT is dangerous environmental pollutant because it is toxic.