A geoengineering flashforward

NASA’s James Hansen has few peers when it comes to the title of leading climatologist-turned-policy-wonk, but Mike Hulme of the University of East Anglia (yes, that university) is giving him a run for his money. Hulme’s latest entry is a cautionary tale involving the challenges involved in geoengineering.

In Yale e360, Hulme argues that the technical obstacles to making the Earth’s climate do what we want aside, the politics of trying to change the radiative heat balance of the atmosphere are problematic in the extreme.
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The trillionth tonne meme gets some traction

The first three of the “America’s Climate Choices” reports from a U.S. National Academy of Sciences committee restate the case that there is “strong, credible body of evidence, based on multiple lines of research, documenting that Earth is warming” and calls for the adoption of “an economy-wide carbon pricing system.” Not really Earth-shattering news, just climate-disrupting. What is worth drawing your attention to is the embrace of something akin to the “trillionth tonne” idea.
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