The global atmospheric concentration of carbon dioxide has increased in the last 200 years. What could be causing this increase
1. emissions from motor vehicles
2. photosynthesis
3. power stations using coal and oil
SELECT ONE
1 and 2 only
1 and 3 only
2 and 3 only
1, 2, and 3
Answers
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1
Answer:
1 and 3 only
Explanation:
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