81 years ago I was the first to show that CO2 levels in the atmosphere were increasing due to burning fossil fuels, and that…

81 years ago I was the first to show that CO2 levels in the atmosphere were increasing due to burning fossil fuels, and that global land temperatures were observed to be warming as a consequence.

EIGHTY-ONE YEARS. https://t.co/1EEOWo8qX5#COP25 #COP25Madrid pic.twitter.com/1I6qwMHfZp

— Guy Callendar (@GuyCallendar) December 3, 2019

(via http://twitter.com/GuyCallendar/status/1201806918932717569)