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Only one-in-a-million chance global warming is not manmade, scientists say
(The Independent, 27 Feb 2019) Last fours years have been hottest since records began in 19th century.
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.
“Humanity cannot afford to ignore such clear signals,” the US-led team wrote in the journal Nature Climate Change of satellite measurements of rising temperatures over the past 40 years.
They said that confidence human activities were raising the heat at the Earth's surface had reached a “five-sigma” level.
This statistical measure 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.
The Independent, 27 Feb 2019: Only one-in-a-million chance global warming is not manmade, scientists say
