When it is burned to produce electricity (petroleum, natural gas, coal) emits the most carbon dioxide. This fossil fuel accounted for ( 1/3, 1/2, 3/4 ) of the electricity generated in the United States and emitted 68 percent of the carbon dioxide produced by generating electricity.

Answer 1

When burned to produce electricity, coal emits the most carbon dioxide. This fossil fuel accounted for 1/3 of the electricity generated in the United States and emitted 68 percent of the carbon dioxide produced by generating electricity.