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Evidence for man-made global warming hits 'gold standard' - scientists
By Alister Doyle
Evidence for man-made global warming has reached a "gold standard" level of certainty, adding pressure for cuts in greenhouse gases to limit rising temperatures, scientists said on Monday.
"Humanity cannot afford to ignore such clear signals," the U.S.-led team wrote in the journal Nature Climate Change of satellite measurements of rising temperatures over the past 40 years.
[...]
They said confidence that human activities were raising the heat at the Earth's surface had reached a "five-sigma" level, a statistical gauge meaning there is only a one-in-a-million chance that the signal would appear if there was no warming.
Such a "gold standard" was applied in 2012, for instance, to confirm the discovery of the Higgs boson subatomic particle, a basic building block of the universe.
[...]
Mainstream scientists say the burning of fossil fuels is causing more floods, droughts, heat waves and rising sea levels.
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