Trump’s America

by Henry on July 22, 2017

(I took this photo with my phone in Dulles Airport a couple of weeks ago)

Can we get to 350 ppm? Yes we can

by John Quiggin on July 22, 2017

There’s been a fair bit of buzz about an article in New York Magazine with an apocalyptic picture of climate change over the next century. I’ll for a more complete response later. But as it happens, I was already preparing a much more optimistic view, arguing that, at least in the absence of political disasters such as a long-running Trump presidency, the world is likely to achieve stabilization of greenhouse gas concentrations around 450 parts per million by 2050, and reduce that to 350 ppm by 2100.

On current models, stabilization at 450ppm gives us a 67 per cent chance of holding the long term increase in global temperatures below 2 degrees. Warming of 2 degrees would not be cataclysmic for humanity as a whole but it would be a disaster for many people and also for vulnerable ecosystems such as coral reefs. That’s why 350.org wants to reduce concentrations to 350 ppm from current levels above 400 ppm. Is that even possible? In my view, the answer is Yes.

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