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Carbon dioxide levels cross 400 ppm threshold, highest in millions of years. As the US House Committee on Science disagrees with climate science consensus, NASA’s chief climate scientist, Gavin Schmidt, is not optimistic: “In my opinion, we won’t ever see a month below 400 ppm”
● [https://www.esrl.noaa.gov/gmd/ccgg/trends/monthly.html '''''Latest CO2 Data Reports from Mauna Loa''''']
 
● [http://www.climatecentral.org/news/we-just-breached-the-410-parts-per-million-threshold-21372 '''''We Just Breached the 410 Parts Per Million Threshold''''']
 
● [http://www.climatecentral.org/news/antarctica-co2-400-ppm-million-years-20451 '''''400 PPM, Science Facts and Global Risks''''']
 
 
● [https://theconversation.com/we-are-heading-for-the-warmest-climate-in-half-a-billion-years-says-new-study-73648 '''April 2017 / Research Report: We are heading for the warmest climate in half a billion years. So what’s the big deal?''']
 
 
[[File:Mauna Loa CO2 week ending May 15, 2017.png]]
 
 
<big><big>'''No Going Back'''</big></big>
 
 
'''Carbon dioxide levels cross 400 ppm threshold, highest in millions of years'''
 
 
[https://www.scientificamerican.com/report/400-ppm-and-climate-change/ '''''400 PPM: What's Next for a Warming Planet / Smithsonian''''']
 
:''Concentrations of greenhouse gases in the atmosphere have reached this level for the first time in millions of years. What does this portend?''
 
:As the [http://www.greenpolicy360.net/w/Earth_and_Space,_Politics US House Committee on Science disagrees with climate science consensus], NASA’s chief climate scientist, Gavin Schmidt, is not optimistic:
:“In my opinion, we won’t ever see a month below 400 ppm.”
 
 
2016 - https://www.theguardian.com/environment/2016/sep/28/the-world-passes-400ppm-carbon-dioxide-threshold-permanently
 
2015 - https://www.theguardian.com/environment/2015/nov/09/earths-climate-entering-new-permanent-reality-as-co2-hits-new-high
 
2014/2013 - https://www.theguardian.com/environment/2013/may/10/carbon-dioxide-highest-level-greenhouse-gas
 
 
 


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[[Category:US Environmental Protection Agency]]
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