Question

select the correct the answer.
which process will decrease the level of co₂ in the atmosphere?
a. growing trees
b. cutting trees
c. burning trees
d. increasing the human population

Explanation:

• Option A: Trees perform photosynthesis, which uses $\ce{CO_2}$ from the atmosphere to produce glucose and oxygen. Growing trees increases the number of plants that can absorb $\ce{CO_2}$, thus decreasing its atmospheric level.
• Option B: Cutting trees reduces the number of plants available to absorb $\ce{CO_2}$, so it does not decrease $\ce{CO_2}$ levels; in fact, it can lead to an increase over time as there are fewer trees to sequester carbon.
• Option C: Burning trees (combustion) releases $\ce{CO_2}$ into the atmosphere, increasing its level.
• Option D: Increasing the human population leads to more consumption of fossil fuels, deforestation for housing/agriculture, and increased respiration, all of which increase $\ce{CO_2}$ levels.

Answer:

A. growing trees