State of Our Climate
​Atmospheric CO2 Concentration
20 April 2016 Scripps ' Levels exceeded 409 parts per million for the first time in recorded history this month.  

​​NOAA 10 Mar 2016
'Carbon dioxide levels are increasing faster than they have in hundreds of thousands of years. It’s explosive compared to natural processes'. Today’s human-made CO2 increase is 200 times faster, a dramatic rate compared to natural processes, Pieter Tans, leader of NOAA’s Global Greenhouse Gas Reference Network
Preindustrial 
​concentration (WMO)

CO2 278 ppm ​

Dec 2016. Press release and links CO2 rate of atmospheric CO2 increase is unprecedented in Earth history at 3 ppm/year 2015 and 2016.

At over 400 ppm atmospheric CO2 is the highest in 15-20 million years
2009 A. Tripati Coupling of CO2 ...  of the Last 20 Million Years 
2013 Yi Ge Zhang A 40-million-year history of atmospheric CO2
CO2 unprecedented rate of increase (WMO 2017)
Abrupt increase of accelerating atmospheric CO2 
1 June 2020 Atmospheric CO2 highest in 23 million years 
Why are CO2 emissions highly cumulative in the atmosphere?​
400 million years
Jan 2020 UK MEt Office .
​2020 Atmospheric CO2 forecast LARGE INCREASE due to  human emissions and forest fires 
VIDEO Scripps animation record of atmospheric CO2, 800,000 year ago to 2019
 Accelerating fossil fuel CO2 trend