ANDRIA HALL, CNN ANCHOR: Get ready to add global warming to the mix of political elements that may prove pivotal in the upcoming elections. A new study says worldwide temperatures could rise dramatically in the next century and pins much of the blame on pollution. CNN environmental correspondent Natalie Pawelski has a look now at the new research and the impact it may have on the campaign trail.</s>NATALIE PAWELSKI, CNN CORRESPONDENT (voice-over): Scientists say the Earth could be getting hotter than expected, and the prime suspect, pollution, is looking guiltier than ever. Earth's average surface temperature could rise from 2.7 to almost 11 degrees Fahrenheit over the next 100 years, that's according to a draft report from the United Nations Intergovernmental Panel on Climate Change. Global warming is blamed on greenhouse gases, like carbon dioxide, which form an atmospheric blanket that warms the Earth. Five years ago, the Intergovernmental Panel said the balance of evidence suggests a discernible human influence on global climate. Scientists who read the panel's latest draft say it makes a much stronger link between pollution and climate change, concluding man- made pollution has likely contributed substantially to observable warming over the last 50 years. Out on the campaign trail, those may prove to be fighting words. Al Gore has often called for action in global warming, while George W. Bush has said the issue needs more study. And some observers are wondering about the timing of this report, leaking out so close to the presidential election. Natalie Pawelski, CNN.
New Study Suggest Worldwide Temperatures Could Rise Dramatically in the Next Century