Science homework help?!?!?!?

2 ⤊

Science homework help?!?!?!?

What are two sources of carbon dioxide in the air??

2007-10-03 11:37:01 · 3 answers · asked by Ciara D 1 in Science & Mathematics ➔ Other - Science

3 answers

breathing out (expiration)

burning fuels (petrol, wood, coal etc)

2007-10-03 11:40:18 · answer #1 · answered by Jay 4 · 1⤊ 0⤋

Both animals and plants respire, i.e., take in oxygen and give out carbon dioxide. (Not to be confused with photosynthesis.) The other major source is, as mentioned, the combustion of materials containing carbon - wood, petroleum and its products, natural gas, coal, etc.

2007-10-03 11:46:21 · answer #2 · answered by TitoBob 7 · 0⤊ 0⤋

Every single mamal that breathes.

Whenever you burn something.

2007-10-03 11:40:58 · answer #3 · answered by Progen P 2 · 1⤊ 0⤋