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This movie misrepresents and edits the facts and only reports the information that backs up one side of the story while ignoring the information that completely contradicts every claim that it makes. I can't imagine how anyone with even a middle school science education could be fooled by the junk science used in this film but since so many people seem to have fallen for it I will detail more information below. (1)Near the beginning of the film, Gore pays respects to his Harvard mentor and inspiration, Dr. Roger Revelle. Gore praises Revelle for his discovery that atmospheric CO2 levels were rising and could potentially contribute to higher temperatures at a global scale. There is no mention of Revelle's article published in the early 1990s concluding that the science is "too uncertain to justify drastic action." (S.F. Singer, C. Starr, and R. Revelle, "What to do about Greenhouse Warming: Look Before You Leap. Cosmos 1 (1993) 28-33.) (2) Gore discusses glacial and snowpack retreats atop Mt. Kilimanjaro, implying that human induced global warming is to blame. But Gore fails to mention that the snows of Kilimanjaro have been retreating for more than 100 years, largely due to declining atmospheric moisture, not global warming. Gore does not acknowledge the two major articles on the subject published in 2004 in the International Journal of Climatology and the Journal of Geophysical Research showing that modern glacier retreat on Kilimanjaro was initiated by a reduction in precipitation at the end of the nineteenth century and not by local or global warming. (3) Many of Gore's conclusions are based on the "Hockey Stick" that shows near constant global temperatures for 1,000 years with a sharp increase in temperature from 1900 onward. The record Gore chooses in the film completely wipes out the Medieval Warm Period of 1,000 years ago and Little Ice Age that started 500 years ago and ended just over 100 years ago. There is evidence from throughout the world that these climate episodes existed, but on Gore's Hockey Stick, they become nothing more than insignificant fluctuations (Gore even jokes at one point about the Medieval Warm period). (4) You will certainly not be surprised to see Katrina, other hurricanes, tornadoes, flash floods, and many types of severe weather events linked by Gore to global warming. However, if one took the time to read the downloadable "Summary for Policymakers" in the latest report from the United Nations Intergovernmental Panel on Climate Change (IPCC), one would learn that "No systematic changes in the frequency of tornadoes, thunder days, or hail events are evident in the limited areas analysed" and that "Changes globally in tropical and extra-tropical storm intensity and frequency are dominated by inter-decadal and multi-decadal variations, with no significant trends evident over the 20th century." (5) Gore claims that sea level rise could drown the Pacific islands, Florida, major cities the world over, and the 9/11 Memorial in New York City. No mention is made of the fact that sea level has been rising at a rate of 1.8 mm per year for the past 8,000 years; the IPCC notes that "No significant acceleration in the rate of sea level rise during the 20th century has been detected." (6) Near the end of the film, we learn of ways the United States could reduce emissions of greenhouse gases back to the levels of 1970. OK. Assume the United States accomplishes this lofty goal, would we see any impact on climate? The well-known answer is no. China, India and many other countries are significantly increasing their emission levels, and global concentrations of CO2 may double this century no matter what we decide to do in the United States. Even if the Kyoto Protocol could be fully implemented to honor the opening of this movie, the globe would be spared no more than a few hundredths of a degree of warming. In 1998, The Oregon Institute of Science and Medicine (OISM) issued a petition for signature by atmospheric scientists saying there is no scientific evidence indicating that human-created greenhouse gases are causing catastrophic global warming. That petition was signed by more than 17,000 scientists and leaders involved in the issue. Global Warming scaremongers have tried to discredit these statements from the opposition, saying either they are too old to be counted in today's debate or that they weren't signed by real scientists. Neither is true. One only has to look at the signers on the documents and statements to know who and what they are. The relevance of the documents can be answered in two ways. First, most of the signers of these documents from the 1990's hold the same positions today. Second, as is the fallacy in the Global Warming debate, such drastic climate changes, as described in the scaremongers diatribes, would not come about overnight. Though the proponents would have you believe otherwise, 15 years is but a microsecond in the study of the earth's activities. "An Inconvenient Truth" is billed as the scariest movie you'll ever see. It may well be, but that's mostly because it is not an accurate depiction of the state of global warming science. Thank you to Dr. Robert C. Balling Jr. who is a professor in the climatology program at Arizona State University.