Since the Turn of This Century,CO 2 in the Atmosphere Has

The Answer of Since the Turn of This Century,CO 2 in the Atmosphere Has

Since the Turn of This Century,CO 2 in the Atmosphere Has

The Answer of Since the Turn of This Century,CO 2 in the Atmosphere Has

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Since the Turn of This Century,CO₂ in the Atmosphere Has

Question 21

Multiple Choice

Since the turn of this century,CO₂ in the atmosphere has

A) been increasing in concentration.
B) been decreasing in concentration.
C) remained at about the same concentration from year to year.
D) disappeared entirely.

Since the Turn of This Century,CO2 in the Atmosphere Has

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Since the Turn of This Century,CO₂ in the Atmosphere Has

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