Why has the Colorado River become an environmental issue?
A. Frequent flooding threatens endangered habitats in the Rocky Mountains.
B. Oil spills have polluted the river and threatened many species.
C. Irrigation has severely reduced the flow of water.
D. River levels are rising rapidly as a result of climate change.
2 answers
I think d
I think that depends on where you are. In CA and AZ, the answer is probably C. In other states, probably D.