Saturday, May 28, 2016

In-Depth:  Experts Assess the Feasibility of ‘Negative Emissions’

Small pieces of clouds (cumulus clouds) moving towards a convergence zone near the horizon (Credit: Click to Enlarge.
To limit climate change to “well below 2C”, as nations agreed to do in Paris last December, modeling shows it is likely that removing carbon dioxide emissions from the atmosphere later on this century will be necessary.

Scientists have imagined a range of “negative emissions” technologies, or NETs, that could do just that, as explained by Carbon Brief yesterday.  But are any of them realistic in practice?
David Keith (Credit: Click to Enlarge.
David Keith, Harvard University – “I am skeptical that BECCS should be used beyond narrow niches…Instead, I would focus on accelerated weathering and air capture which could, in principle, be scaled to many gigatonnes per year with low land footprint.”

Read more at In-Depth:  Experts Assess the Feasibility of ‘Negative Emissions’

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