There is More CO2 in the Atmosphere Today Than Any Point Since the Evolution of Humans

According to data from the Mauna Loa Observatory in Hawaii, the concentration of CO2 in the atmosphere is over 415 parts per million (ppm), far higher than at any point in the last 800,000 years, since before the evolution of homo sapiens. From a report: Holthaus spotted the new high on Sunday when it was tweeted out by the Scripps Institution of Oceanography, which measures daily CO2 rates at Mauna Loa along with scientists from the National Oceanic and Atmospheric Administration. Measurements have been ongoing since the program was started in 1958 by the late Charles David Keeling, for whom the Keeling Curve, a graph of increasing CO2 concentration in the atmosphere, is named. "This is the first time in human history our planet's atmosphere has had more than 415ppm CO2," Holthaus said in a widely shared tweet. "Not just in recorded history, not just since the invention of agriculture 10,000 years ago. Since before modern humans existed millions of years ago," added Holthaus.