Answer:
increase
Explanation: CO2 is a greenhouse gas. It traps infrared light and prevents it from leaving Earth. So, if the level of CO2 increases, more heat will be trapped, which will result in an increase in Earth’s average temperature.
Increase temperature
Step-by-step explanation:
CO2 is a greenhouse gas that traps heat and bounces it back to earth. If it increases, then that means more heat would be trapped.
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