State of Our Climate

​Recent Data
Preindustrial GHG
​concentrations (WMO)

CO2 278 ppm ​
Methane ​722 ppb
Nitrous oxide​ 270 ppb
Atmospheric CO2  at a 3.5 million year high,  and increasing at an unprecedented rate (WMO 2017)
PDF (hi def) of poster April 2018
Low definition image of April 2018 poster presentation of atmospheric GHG pollution climate system data sets and direct effects