Since this is not my area of expertise, I searched Google under the key words "change carbon dioxide in atmosphere" to get these possible sources:
http://www.google.com/search?client=safari&rls=en&q=change+carbon+dioxide+in+atmosphere&ie=UTF-8&oe=UTF-8
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
What activities increase the amount of carbon dioxide in the atmosphere? What activities decrease the amount of carbon dioxide in the atmosphere?
2 answers
how can be measure co2 in atmosphere