Gallery: Study Says Scientists Agree That Man Is Causing Global Warming


Thousands of papers written by scientists over the last twenty years are in agreement that man-made carbon emissions are the driving force behind climate change. Geologist Dr. James L. Powell of Oberlin College took on the arduous task of filtering through 13,950 papers written on the subject, concluding that just twenty-four of them did not support this fact. Spanning as far back as January of 1991, 99.83 percent agreed that humans play a major role in global warming.

With all the recent talk in the news surrounding climate change, this may not seem like a surprising analysis, but scientists of the early 1990s may have taken a bit more convincing. Surveys similar to Powell’s have been collected in the past few years, but none as in-depth as the amount of papers reviewed in his study.

The 13,950 papers reviewed included data by 33,690 researchers, while other studies were on a smaller scale of 1,372 researchers. Yet the statistics for each study remains the same, roughly 98 percent of the scientists involved agreed that man is heating up the planet. Anthropogenic climate change, or man-made global warming, has been a hot topic in recent years, and these paper analyses only further support that the issue is no longer a theory but a real problem.

It’s hard to say whether global climate change would be stalled if we had listened to the inquisitive scientists of 1991, but Powell’s findings provide evidence for those who still don’t believe in global warming.

Via Huffington Post


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  1. joerock February 24, 2015 at 8:00 am

    Some caution about the math used by Dr. Powell coming from Dr Powell himself about the 99%, “Polls of scientists reinforce this conclusion, but polls are no substitute for the primary, peer-reviewed literature, the ground truth of science.” This should be condensed further to ‘Polls of scientists are no substitute for the primary science’. This study is a essentially a poll as its comparison of papers is more or less a comparison of apples to oranges
    24 papers were written about explicit scientific research that came to a different conclusion. Powell does not mention how many papers involved research explicitly proving AGW. While it is much higher than the 24 in opposition, it is also significantly lower than the 13950 that were examined. Again in Powell’s words, the papers were “classified as about effects, mitigation, adaptation, methods of detecting, climate modeling, and paleoclimatology.” by people who had accepted the theory as scientific truth.
    While there is no doubt that man is impacting his own environment, there are still scientists trying to improve on the science. Furthermore, when the IPCC drops the ‘S’ from ‘models’ there will be no more debate.

  2. azrt December 14, 2012 at 4:29 am


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