a. decreased significantly
Biology, 19.08.2019 13:50 limelight11
Over the past 20 years, the major pollutants in our world have
a. decreased significantly
b. increased significantly
c. stayed at the same levels
d. decreased slightly
Answers: 2
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Over the past 20 years, the major pollutants in our world have
a. decreased significantly
a. decreased significantly
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