OPT:
[I] the atmosphere;
[II] Greenhouse gasses;
[III] climate;
[IV] Greenhouse gases;
[V] sunlight;
[VI] circulatory systems;
[VII] space;
[VIII] carbon dioxide;

Fact 1: Burning fossil fuels increases the carbon in the atmosphere. Fact 2: Like coal, petroleum is a fossil fuel. Given the two facts above, what does burning coal increase carbon in?
Answer:
[I]