Carbon dioxide levels hitting historic high is the final wake-up

At 415 ppm, carbon dioxide level is at highest ever in human history

World carbon dioxide levels highest for 650,000 years, says US

Carbon dioxide now at record levels not seen in over 4 million

Benchmark EU carbon price closes at its lowest level since March

Carbon dioxide hits 400 ppm for the first time in human history

I'm living in a carbon bubble. Literally., by Joel Jean

Carbon Dioxide Levels Now Higher Than Ever in Human History

Carbon Dioxide Is Rising at Record Rates

Do high levels of CO2 in the past contradict the warming effect of

Climate Milestone: Earth's CO2 Level Passes 400 ppm

I'm living in a carbon bubble. Literally., by Joel Jean

RealClimate: Not just another dot on the graph?