Question

what is carbon dioxide

Answer 1

http://en.wikipedia.org/wiki/Carbon_dioxide

The link above gives more knowledge than you probably need. If you face any problem please elaborate in what sense do you need to know.

Answer 2

thank you

Answer 3

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.

Answer 4

Askin in Chemistry, not computers.