The evidence of change is compelling. While predictions of the future may be inaccurate, the IPCC has increased its confidence in its computer projections, and believes a 2 to 6 degree F rise is possible. That could lead to a sea-level rise of 6 to 38 inches and changes in the frequency of drought and flooding. At Kyoto, the business community it lobbying against CO2 limits, the environmental community for limits. But that is a political call not a scientific one.
Greater gains are possible in some areas.