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Line 1: − Scientists such as [[Richard Lindzen]] and [[Fred Singer]] say that the patterns of global warming are naturally caused. + + +
Scientists vs. UN
'''Global warming''' is the term ascribed to an increase in global average surface temperature.
'''Global warming''' is the term ascribed to an increase in global average surface temperature.
Scientists such as [[Richard Lindzen]] of MIT, [[Sallie Baliunas]] of Harvard and [[Fred Singer]] (independent) say that the patterns of global warming are naturally caused (see [[climate cycles]]).
Assessments by the United Nations promote the view that the warming since around 1850 is mostly human-caused.
In February, 2007, the [[Intergovernmental Panel on Climate Change]], a body of climate change scientists<ref>http://www.chicagotribune.com/news/nationworld/chi-0704280477apr29,1,4275902.story?coll=chi-newsnationworld-hed</ref> established by the [[United Nations]], released their fourth assessment report on climate change. That report concluded that recent global climate change was "very likely" caused by human activity, <ref>http://news.bbc.co.uk/2/hi/science/nature/6321351.stm</ref>.
In February, 2007, the [[Intergovernmental Panel on Climate Change]], a body of climate change scientists<ref>http://www.chicagotribune.com/news/nationworld/chi-0704280477apr29,1,4275902.story?coll=chi-newsnationworld-hed</ref> established by the [[United Nations]], released their fourth assessment report on climate change. That report concluded that recent global climate change was "very likely" caused by human activity, <ref>http://news.bbc.co.uk/2/hi/science/nature/6321351.stm</ref>.