DDT to fight typhus and malaria nearly kills off many species of birds.
MTBE in the water supply
But I don't know how you can get worse than the plastics that accumulate in our oceans and on our beaches. Bottled water, however, is the biggest offender.
The Tampa Tribune tested more than a dozen bags from major grocers and found certain bags sold in Winn-Dixie and Publix stores had lead levels that concerned health officials. In a preview of a Sunday article, the newspaper's website reported that some bags had enough lead they could be considered hazardous waste if residents disposed of them in household trash.Winn-Dixie, Publix Reusable Grocery Bags Found To Contain Lead, Some Enough To Be Considered Hazardous Waste: Tampa Tribune