Question

which process can affect the rate of carbon dioxide emissions or other greenhouse gas emissions by changing average temperatures? a) axial precession b) continental drift c) greenhouse gas feedback d) cloud cover feedback

Explanation:

To solve this, we analyze each option:

• Option A: Axial precession affects Earth's orbit and seasons over long periods but not directly greenhouse gas emissions via temperature change.
• Option B: Continental drift impacts climate over geological timescales (e.g., by changing land - ocean distribution) but not the rate of greenhouse gas emissions through temperature - driven processes.
• Option C: Greenhouse gas feedback works as follows: when temperatures change (e.g., warm), processes like the release of carbon dioxide from the ocean or permafrost can occur. This change in temperature leads to a change in the rate of greenhouse gas (like $CO_2$) emissions, and then the increased greenhouse gases further affect temperature, creating a feedback loop. This directly matches the description of a process that affects greenhouse gas emission rates by changing average temperatures.
• Option D: Cloud cover feedback affects temperature by changing the amount of solar radiation reflected or trapped, but it does not directly affect the rate of greenhouse gas emissions.

Answer:

C) Greenhouse gas feedback