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Goodbye cruel world: we’ve passed the carbon tipping point

We have passed a grim new milestone for atmospheric carbon dioxide levels, probably for good. Earlier this week Mauna Loa Observatory, a key site for keeping tabs on carbon dioxide measured 400 parts […]
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Weekend Open Thread: Where Were You When CO2 Hit 400 PPM?

US Politics / Liberal : ThinkProgress: Justice

Earth’s atmosphere hit 400 parts per million of carbon dioxide last month — the highest level humans have ever experienced. This can be easily tracked here through measurements at an observatory on Mauna Loa in Hawai’i. The Keeling ...

Tim Profeta: The Climate Post: Carbon Dioxide Milestone Revised by NOAA

Politics / US Politics : Huffington Post: Politics Blog

The National Oceanic and Atmospheric Administration (NOAA) announced last week that carbon dioxide concentrations at the Mauna Loa Observatory in Hawaii surpassed the milestone 400 parts per million for a sustained period.

New Milestone for CO2 Levels: Mauna Loa Observatory Records 400 PPM

Technology : Technology Review Editors' Blog

We’ve hit 400 ppm of carbon dioxide, but we won’t know what that means for decades. The National Oceanic and Atmospheric Administration and Scripps Institution of Oceanography say that the carbon dioxide concentration in the atmosph...

Carbon dioxide at NOAA's Mauna Loa Observatory reaches new milestone: Tops 400 parts per million

Academics / General Science : ScienceDaily: Science Society

On May 9, the daily mean concentration of carbon dioxide in the atmosphere of Mauna Loa, Hawaii, surpassed 400 parts per million (ppm) for the first time since measurements began in 1958. Independent measurements made by both NOAA a...

We Just Passed A Grim Carbon Dioxide Threshold, Possibly For Good

News : Huffington Post

The world has hit a global warming milestone it may never recover from. Scientists at the Mauna Loa Observatory in Hawaii announced in 2013 that atmospheric concentrations of carbon dioxide reached a daily average above 400 parts pe...


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