Clear something up for me.
Do you mean natural global warming or anthropogenic global warming?
My view is that natural climate fluctuation is a fact, and that there are reasons to be concerned about anthropogenic impacts of massive GHG emissions. Our understanding of the interactive roles of volcanos, aerosol pollutants, feedback loops, GHGs, El Nino, and solar variance is still in its early adolescence. Jacques Chirac and others have conceded that the concept of AGW is being used as a vehicle to create global governance. I do have concerns about AGW, but am also very concerned that its certainty is exagerated, healthy skepticism is marginalized, and AGW is used to achieve big government objectives.