the cynic in me wants to think that this isn't really a problem at all. In 40 years, fossil fuels will be too expensive to produce these greenhouse gases anymore. So, things will revert to normal. Also, plants will grow more numerous and larger, to eat up the C02. This happened back in the carboniferous period if i'm not mistaken because life can compensate for the C02 our world belches out. So, things may not be as bad as they seem. Now scientists are worried and given the data that would seem rational. But they also aren't factoring in the fact that our fossil fuels are what is creating this problem and that they are limited.
I'm more worried about things like world hunger, genocide, etc etc etc.