I think this topic often is discussed with the knowledge learned on television or mentions in the newspaper.
If you look at the entire picture of research out there -- there are some key points to look at:
1. The Earth is getting warmer. It is getting warmer faster then has ever been recoreded -- or to this point can be determined from ice core samples.
2. Most people will agree that it is partly due to industrialization. Not everyone agrees it is CO2 alone.
3. Studies on sun output to this point have been questionable. Two satellite studies have data that may be flawed.
4. We should make preperations for adapting to the changes a warmer Earth will bring.
Personal Opinion: Carbon Dioxide is not the main cause. A volcanic eruption spews more CO2 than we have put into the atmosphere since the Industrial Revolution began. However, our constant output spread all over the globe is making it more difficult for the Earth to process this carbon. In my opinion, it is the mass transition of land that is a major cause. We burn carbon poorly, causing soot to be deposited -- which absorbs more energy. We build more buildings and roads at the expense of trees and grass -- which also absorbs more energy.
We should try to burn less carbon, but it isn't necessarily the main cause of "global climate change."