I recently managed to watch a copy of An Inconvenient Truth, and then also watched the film "The Day after tomorrow". The real challenge of understanding the impact of global warming and so forth. I therefore recommend browsing to www.climatecrisis.net where you can find out more information about planetary science and impacts of global warming. This documentary which featured slide shows of Al Gore, showed the melting of the polar ice caps and the effects of planetary atmospherics, and the resulting flooding and weather impacts of the continual ignorance in relation to what we as a developed society must do. That is to use renewable energy sources, like wind, geothermal and solar power, rather than burning coal.