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Deforestation for timber and farmland is responsible for about 92 billion tons of carbon emissions into the environment since 1900, found a study led by researchers at The Ohio State University and Yale University. “Our estimate is about a fifth of what was found in previous workshowing that deforestation has contributed 484 billion tons of carbon – a third of all manmade emissions – since 1900,” said Brent Sohngen, a professor of environmental and resource economics at Ohio State. He said that widely accepted estimate didn’t take into account the planting of new trees and other forest management techniques that lessen the environmental burden.

https://news.osu.edu/lost-trees-hugely-overrated-as-environmental-threat-study-finds/

Причем вся эта лесная наука, ес-но, попадает напрямую в отчёты IPCC: “ Emissions from deforestation in the 1990s are estimated at 5.8

GtCO2/yr (medium agreement, medium evidence).”

https://www.ipcc.ch/site/assets/uploads/2018/02/ar4-wg3-chapter9-1.pdf

Надо полагать проф. Сонгрен только что приобрёл много новых друзей из числа коллег и энтузиастов из всяких гринписов.