Thread by @ClimateBen

Dear Journalists,

Is the message from scientists "we need zero emissions by 2028 or so because of feedbacks and then climate change must be reversed somehow but geoengineering presents a danger to all life on Earth and carbon-sucking technology at scale is a fantasy"?

Love,
Ben

“If rapid emission reductions are initiated soon, it is still possible that at least a large fraction of required CO2 extraction can be achieved via relatively natural agricultural and forestry practices with other benefits,” the authors wrote.

From 2016:
insideclimatenews.org/news/06102016/…

“On the other hand, if large fossil fuel emissions are allowed to continue, the scale and cost of industrial CO2 extraction, occurring in conjunction with a deteriorating climate with growing economic effects, may become unmanageable."

From 2016:
insideclimatenews.org/news/06102016/…

'countries have to achieve “negative emissions,” by removing more accumulated CO2 from the atmosphere.'

'the most optimistic scenario.. requires pulling 72 ppm of CO2 out of the air by 2100— a more plausible, but still difficult burden.'

From 2016:

insideclimatenews.org/news/06102016/…

'1.5 degree C and 2 degree C temperature targets.. "are far above the Holocene temperature range.. If such temperature levels are allowed to long exist they will spur ‘slow’ amplifying feedbacks, which may have potential to run out of humanity’s control."

insideclimatenews.org/news/06102016/…

To achieve negative emissions the study recommends using forestry and agricultural practices that increase the carbon-sucking ability of soil and trees.. Even if that’s achieved, more expensive and intensive methods for emissions extraction would be needed'insideclimatenews.org/news/06102016/…

"We assume that improved practices will aim at optimizing agricultural and forest carbon uptake via relatively natural approaches.. In contrast, proposed technological extraction and storage of CO2 does not have co-benefits and remains unproven at.. scale.”insideclimatenews.org/news/06102016/…

5 years on and no action has been taken.

The combination of abrupt climate change, habitat destruction, and pollution looks more and more like a predicament to me, with positive actions still possible but no 'solutions' in sight.

You can follow Dr Hansen:

https://twitter.com/DrJamesEHansen/status/1338515541464510464?s=19