Interesting
Less than 400 PPm no more.
http://www.climatecentral.org/news/world-passes-400-ppm-threshold-permanently-20738?utm_content=bufferbca7f&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer
Opened from On this day, so replying is off here — an old thread is not bumped by accident. To reply, open the thread normally.