Why is CO2 a bigger concern for global climate change?

[snoopenes]

http://imageshack.us/m/155/6668/graphdm.jpg

Both carbon dioxide (CO2) and water-vapor (H2O) represent greenhouse gases. Recall that while the society is concerned about CO2 emissions, no-one worries about the amount of water-vapor released after cooking a meal. Looking at the graph given below, provide two reasons for why emissions of CO2 represent a higher concern for global climate change.

 

[SammyS]

What do you think?

 

[SpectraCat]

Boy, that sure looks a lot like a homework question. Have you read the guidelines for getting help for homework? Why don't you start be telling us what *you* think the answer is, and explain in detail what you find confusing. Then perhaps we will be better able to help you.

 

[snoopenes]

my answer for this question is

-Change in the incoming solar radiation.(By changes in the Earth’s orbit or the sun itself)
-Change in the fraction for solar radiation that is reflected.

 

[Idoubt]

which component in the atmosphere absorbs the most radiation emitted by the sun and which component absorbs the most radiation emitted by the earth.

(hint: this has to do with which frequencies the Earth and sun emit with greatest intensity)