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

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

Graphic: Carbon dioxide hits new high

Visualizing Global Per Capita CO2 Emissions

Revealed: World's CO2 emissions set to rise by about 1 per cent to new record in 2023

Global atmospheric CO2 levels hit record high, Greenhouse gas emissions

War on cow gas is stinky but necessary job in climate-change struggle

Global carbon dioxide in atmosphere passes milestone level, Climate crisis

Carbon Dioxide Is Rising at Record Rates

RealClimate: Back to basics

Increased levels of carbon dioxide could reduce brainpower, study finds

A Graphical History of Atmospheric CO2 Levels Over Time

OC] Global warming: 140 years of data from NASA visualised : r/dataisbeautiful

A Graphical History of Atmospheric CO2 Levels Over Time

MeCCO Monthly Summaries :: Media and Climate Change Observatory

CO2 hit record high in 2011 – UN report, Greenhouse gas emissions