Fossil fuels are a form of chemical energy that can be used to produce electrical, heat, and mechanical energy. Which of the following is an environmental disadvantage of using fossil fuels?
A. Fossil fuels are easy to transport.
B. Fossil fuels are only practical in windy areas.
C. Fossil fuels provide a large amount of heat energy per unit of mass.
D. Burning fossil fuels produces air pollution.

Question

Fossil fuels are a form of chemical energy that can be used to produce electrical, heat, and mechanical energy. Which of the following is an environmental disadvantage of using fossil fuels?
	A. 	Fossil fuels are easy to transport.
	B. 	Fossil fuels are only practical in windy areas.
	C. 	Fossil fuels provide a large amount of heat energy per unit of mass.
	D. 	Burning fossil fuels produces air pollution.

anonymous · Answer

D. burning fossil fuels is horrible for the air.

anonymous · Answer

also if you read the questions you can kinda tell that that's the answer.
"Fossil fuels are easy to transport." that's not really a disadvantage now is it?
"Fossil fuels are only practical in windy areas." again, not really a disadvantage.
"Fossil fuels provide a large amount of heat energy per unit of mass." that could eventually be a disadvantage but at the moment. no. not a disadvantage.  but 
"Burning fossil fuels produces air pollution." yes, that's a huge disadvantage