| First question:
The growth of rain forest (of course the growth of anything organic helps remove carbon from the atmosphere)
Second Question:
The answer the school will want is burning of fossil fuels, but current scientific data supports the idea that it's actually do to out-gassing from the oceans.
Third Question:
Acid rain (the sulfur dioxide from coal and carbon dioxide from alot of other sources will combine with water to create sulfuric acid and carbonic acid, respectively).
Fourth Question:
Not sure about this one, but I'm leaning towards D |