Approximately 9 million childhood lead poisonings were prevented in the United States between 1976 and 2007 primarily because of

a. a ban on the use of lead-based paints and leaded gasoline
b. a ban on the use of lead in car batteries
c. a ban on the use of lead in pencils
d. a ban on the use of transfused blood contaminated with lead
e. all of these answers


A

Environmental & Atmospheric Sciences

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