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If there was no CO2 in the earth’s atmosphere the temperature of earth’s surface would be

1. higher than the present form environmental issues
2. less than the present
3. the same
4. dependent on the amount of oxygen in the atmosphere from environmental issues

Correct answer: less than the present

Solution

CO2 is a greenhouse gas that traps heat in the Earth's atmosphere. Without it, the Earth's surface temperature would drop significantly, making it less than the present temperature.

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