asked 26.1k views
2 votes
In studies scientists have found that the level of carbon dioxide has increased. What is an explanation for this?

A. volcanoes erupting
B. humans use of fossil fuels
C. climate change
D. photosynthesis

2 Answers

3 votes

B. humans use of fossil fuels


answered
User FlyingStreudel
by
9.2k points
6 votes
B. HUMANS USE OF FOSSIL FUELS
answered
User Richrd
by
7.7k points
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