- Earth's CO2 Levels Have Crossed A 'Red Line' http://www.ibtimes.com/climate-change-earths-atmospheric-co2-levels-have-permanently-crossed-400-ppm-red-2423031 32 comments worldnews
- Atmospheric CO2 now above 400ppm, a turning point that is likely permanent http://www.ibtimes.com/climate-change-earths-atmospheric-co2-levels-have-permanently-crossed-400-ppm-red-2423031 6 comments worldnews
Linked pages
- The World Passes 400 PPM Threshold. Permanently | Climate Central http://www.climatecentral.org/news/world-passes-400-ppm-threshold-permanently-20738 268 comments
- Flipboard: Your Social Magazine http://www.flipboard.com/ 95 comments
- The Last Time CO2 Was This High, Humans Didn't Exist | Climate Central https://www.climatecentral.org/news/the-last-time-co2-was-this-high-humans-didnt-exist-15938 1 comment
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