Global Warming Causes, Climate Change Causes - National Geographic - 0 views
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The only way to explain the pattern is to include the effect of greenhouse gases (GHGs) emitted by humans.
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the United Nations formed a group of scientists called the International Panel on Climate Change, or IPCC. The IPCC meets every few years to review the latest scientific findings and write a report summarizing all that is known about global warming
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Most come from the combustion of fossil fuels in cars, factories and electricity production
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