Many aspects, however, have already been discounted by the scientific community. ... Over 17,000 scientists have signed a petition saying, in part, "there is no convincing scientific evidence that human release of carbon dioxide, methane, or other greenhouse gases is causing or will, in the foreseeable future, cause catastrophic heating of the Earth's atmosphere and disruption of the Earth's climate" (Roleff, 1997). ... Since the industrial revolution, atmospheric concentrations of carbon dioxide, methane and nitrous oxide have risen, enhancing the heart-trapping ...

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• Approx Pages: 4
• Grade Level: High School