UPDATESG6 CANADA 6/9/18NEW YORKER TANGIER ISLAND
"If humanity wishes to preserve a planet similar to that on which civilization developed and to which life on Earth is adapted...CO2 will need to be reduced...to at most 350 ppm."
Open Atmospheric Science Journal, 2008, vol. 2
IN 2009 A REDUCTION IN EMISSIONS COULD ACHIEVE 350 PPM IN A REASONABLE TIME. THIS IS NO LONGER TRUE.How the World Passed a Carbon Threshold and Why It Matters
BY NICOLA JONES • JANUARY 26, 2017
Ian Johnston Environment Correspondent @montaukian Tuesday 18 July 2017 14:40 BST164
Humans must start removing carbon dioxide from the atmosphere as soon as possible to avoid saddling future generations with a choice between extreme climate change or spending hundreds of trillions of dollars to avoid it, according to new research. An international team of researchers – led by Professor Jim Hansen, Nasa’s former climate science chief – said their conclusion that the world had already overshot targets to limit global warming to within acceptable levels was “sufficiently grim” to force them to urge “rapid emission reductions”. But they warned this would not be enough and efforts would need to be made to reduce the amount of carbon dioxide in the atmosphere by about 12.5 per cent. This, the scientists argued, could be mostly achieved by agricultural measures such as planting trees and improving soil fertility, a relatively low-cost way to remove carbon from the air.
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Other more expensive methods, such as burning biomass in power plants fitted with carbon-capture-and-storage or devices that can remove carbon from the air directly, might also be necessary and would become increasingly needed if steps were not taken soon.
An academic paper in the journal Earth System Dynamics estimated such industrial processes could cost up to $535 trillion this century and “also have large risks and uncertain feasibility”. “Continued high fossil fuel emissions unarguably sentences young people to either a massive, implausible clean-up or growing deleterious climate impacts or both,” said the paper.
“We conclude that the world has already overshot appropriate targets for greenhouse gas amount and global temperature, and we thus infer an urgent need for rapid phasedown of fossil fuel emissions [and] actions that draw down atmospheric carbon dioxide. “These tasks are formidable and … they are not being pursued globally.” Cuts to emissions of greenhouse gases such as methane, nitrous oxide and ozone would also be required.
31 scientific bodies tell US Congress: Climate change is real The study is to be used as part of a ground-breaking lawsuit brought against the US Government by 21 children in which the plaintiffs claim their constitutional right to have a health climate in which to live in is being violated by federal policies. If the case succeeds, environmentalists believe it could force the Trump administration to reduce greenhouse gases and take other measures to prevent global warming. The paper pointed out that the last time temperatures were this high, during the Eemian period, global sea levels were about six to nine metres higher than they are today, suggesting significant rises are still to occur. The paper said that the Paris Agreement, the tumbling price of renewable energy and the recent slowdown in the increase of fossil fuel emissions had led to a sense of optimism around the world. But, speaking to The Independent, Professor Hansen said he believed this optimism was misplaced. “The narrative that’s out there now … is that we’ve turned the corner,” he said. “On the contrary, what we show is the rate of growth of climate forcing caused by increased methane [and other gases] is actually accelerating. That’s why it’s urgent.”