In 1970,the source of most of the airborne lead emissions in the U.S.was ________________
A)coal -burning power plants
B)water pipes
C)paint
D)gasoline
E)pencil factories

Question

Quizplus · Accepted Answer

In 1970, gasoline containing lead was the primary source of airborne lead emissions in the U.S. Lead was added to gasoline to improve engine performance until the Environmental Protection Agency (EPA) began phasing out leaded gasoline in the 1970s due to its harmful effects on human health and the environment.

In 1970,the Source of Most of the Airborne Lead Emissions