The warming of the Earth’s surface caused by burning fossil fuels and clearing land is known as:
A.	ozone depletion.
B.	global warming.
C.	a greenhouse gas.
D.	a volatile organic chain reaction.
Answer:B
The warming of the Earth’s surface caused by burning fossil fuels and clearing land is known as:
A.	ozone depletion. B.	global warming. C.	a greenhouse gas. D.	a volatile organic chain reaction.