Question

Select the correct answer from each drop-down menu.

(drop-down menu)tends to raise CO2 levels in the atmosphere, but
(drop-down menu) tends to lower CO2 levels in the atmosphere.

Answer 1

respiration and photosynthesis maybe as I can't see the options

Step-by-step explanation:

Answer 2

Cutting down trees instead of growing trees

using clean energy sources instead of fossil fuels.

Explanation: Took the test and I got it correct.