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Which of the following processes is not primarily caused by humans? A. air pollution B. the greenhouse effect C. thinning of the ozone layer D. increased carbon dioxide levels .…

Which of the following processes is not primarily caused by humans? A. air pollution B. the greenhouse effect C. thinning of the ozone layer D. increased carbon dioxide levels .…
asked 71.0k views
4 votes
Which of the following processes is not primarily caused by humans?

A. air pollution
B. the greenhouse effect
C. thinning of the ozone layer
D. increased carbon dioxide levels
.

asked
User ChrisY
by
7.9k points

2 Answers

2 votes

Answer:

D

Step-by-step explanation:

from my own understanding,we are not the only ones on this planet there are other animals

answered
User ILiA
by
8.0k points
3 votes

Answer:

D

Step-by-step explanation:

A,B,C all caused by human. But D is less

answered
User Alex Spangher
by
7.5k points
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