"These CO2 projections are used in current climate models to predict important changes over the next 100 years. This set of results is taken from the National Research Council (NRC) report "Changing Climate". Consensus predictions call for warming 1.5-4.5 [degrees Celsius] for doubled CO2 with greater warming at the poles. Note that these numbers reflect the range produced by available models. No one knows how to evaluate the absolute uncertainty in the numbers. The extent and thickness of glaciers are predicted to decrease, leading to sea level rise. The NRC report chose a most likely value of 70 cm sea level rise. Other predictions suggest a broader range from 30-200 cm. The rise occurs both from a larger amount of water in the oceans, and from thermal expansion. Finally, climate change and higher levels of atmospheric CO2 affect agriculture and ecosystems.... Data confirm that greenhouse gases are increasing in the atmosphere. Fossil fuels contribute most of the CO2.... Projections suggest significant climate change with a variety of regional impacts. Sea level rise with generally negative consequences.... Arguments that we can’t tolerate delay and must act now can lead to irreversible and costly Draconian steps.... To be a responsible participant and part of the solution to [potential enhanced greenhouse], Exxon's position should recognize and support 2 basic societal needs. First ... to improve understanding of the problem ... not just the science ... but the costs and economics tempered by the sociopolitical realities. That's going to take years (probably decades). But there are measures already underway that will improve our environment in various ways ... and in addition reduce the growth in greenhouse gases. That's the second need including things like energy conservation, restriction of CFC emissions, and efforts to increase the global ratio of re/de forestation. Of course, we'll need to develop other response options...implementing measures when they are cost effective in the near term and pursuing new technologies for the future."