How are the changes in Atmospheric carbon dioxide described?
Carbon Dioxide levels have remained the same
carbon dioxide levels have decreased
carbon dioxide levels have increased
Carbon dioxide levels cannot be measured

Question

How are the changes in Atmospheric carbon dioxide described?
Carbon Dioxide levels have remained the same
carbon dioxide levels have decreased 
carbon dioxide levels have increased 
Carbon dioxide levels cannot be measured

e.mccormick · Answer

Social Sciences are things like Law, Communications, Sociology, and so on.  What you have asked goes elsewhere.

Did you try in Geography or Biology?  Geography if this is an earth science question and bio for bio questions.