‘Case closed’: 99.9% of scientists agree with human-caused climate emergency | climate crisis
The scientific consensus that humans are changing the climate has passed 99.9%, according to research advancing the case for global action at the Cop26 summit in Glasgow.
The authors say the degree of scientific certainty about the effect of greenhouse gases now resembles the level of agreement on evolution and plate tectonics, based on a survey of nearly 90,000 climate-related studies. This means that there is practically no doubt among experts that burning fossil fuels, such as oil, gas, coal, peat, and trees, is heating the planet and causing more extreme weather.
A previous survey in 2013 showed that 97% of studies published between 1991 and 2012 support the idea that human activities are changing the Earth’s climate.
This has been updated and expanded by study from Cornell University showing that the tiny minority of skeptical voices has dwindled to almost nothing as evidence of the link between burning fossil fuels and climate disruption mounts.
The last survey of the peer-reviewed literature published from 2012 to November 2020 was conducted in two phases. First, the researchers examined a random sample of 3,000 studies, finding only four papers that questioned that the climate crisis was caused by humans. Second, they searched the entire database of 88,125 studies for keywords associated with climate skepticism such as “natural cycles” and “cosmic rays,” which yielded 28 papers, all published in secondary journals.
The authors said their study, published Tuesday in the journal Environment research Messages, doubts among experts now showed extremely small.
“It’s really a closed case. No one of interest in the scientific community doubts human-caused climate change,” said lead author Mark Linas, a visiting fellow at Cornell University.
He reiterated this view expressed by the world’s leading scientific body, the United Nations’ Intergovernmental Panel on Climate Change, in August, who said: “It is unequivocal that human influence has warmed the atmosphere, oceans and land.”
the public Not yet understood how certain experts, and is not reflected in the political debate. This is especially true in the United States, where fossil fuel companies have funded a disinformation campaign that incorrectly suggests that the science is not yet settled, similar to the campaign launched by the tobacco industries to question the link between smoking and cancer.
The paper cites a 2016 Pew Research Center study that found that only 27% of U.S. adults believe that “nearly all scientists” agreed that the climate emergency was caused by human activity.
Many senior Republicans continue to question the link between human activity and the climate crisis as market researchers They have been advised to do so since at least the presidency of George W. Bush. According to the Center for American Progress, 30 US senators and 109 representatives “refuse to recognize the scientific evidence for human-caused climate change.” Many major media organizations and social networks also promote skeptical views of the climate that have no scientific basis or are unfounded.
Linas said the study should encourage them to review their policies. This puts the likes of Facebook and Twitter in a bind. It is very similar to vaccine misinformation; Both lack a foundation in science and both have a devastating effect on society. Social networks that allow climate misinformation to be spread need to consider their own algorithms and policies or be forced to do so by regulators.”
Some commentators have challenged the importance of the scientific consensus, saying it has distracted from more pressing concerns. However, they say it is important that media organizations avoid giving a false sense of balance by giving equal weight and coverage to arguments for and against. Most importantly, consensus It is seen as vital to a coordinated international response to the climate crisis.