Multiple Choice
The increase of atmospheric CO2 levels to 400 ppm has tipped Earth's natural greenhouse effect toward global warming.The rise of CO2 is due to
A) human activity-the burning of fossil fuels (coal,oil,and gas) and deforestation.
B) human activity-overpopulation and increased reliance on solar energy.
C) human negligence-efforts of not recycling waste materials for potential reuse.
D) the industrial revolution and increased cloud cover.
Correct Answer:
Verified
Correct Answer:
Verified
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