What are three human activities that increase the levels of green house gases?

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Please three!

1. Breathing

2. Breathing

3. Breathing

2007-05-21 11:57:47 · answer #1 · answered by johnvilla50 4 · 0⤊ 0⤋

driving cars, generating electricity with oil or coal burning power plants, cutting down trees.

2007-05-21 17:24:48 · answer #2 · answered by Stephen L 6 · 0⤊ 1⤋

Coal burning, CFCs and cow farts.

2007-05-21 17:23:47 · answer #3 · answered by hibbo_j 4 · 0⤊ 1⤋

driving cars
leaving our lights on all nighyt

2007-05-21 18:05:22 · answer #4 · answered by Anonymous · 0⤊ 1⤋