Eldering says we are still on 'business-as-usual' path with CO2

"Reaching 400pm is a stark reminder that the world is still not on a track to limit CO2 emissions and therefore climate impacts. We're still on the 'business-as-usual' path, and adding more and more CO2, which will impact the generations ahead of us. Passing this mark should motivate us to advocate for focused efforts to reduce emissions across the globe."

Read more quotes from NASA scientists on the 400 ppm carbon milestone