Carbon dioxide levels breach another threshold at Mauna Loa
Monthly average surpasses 410 parts per million for April and May
June 7, 2018
Carbon dioxide levels averaged more than 410 parts per million in April and May at NOAA’s Mauna Loa Atmospheric Baseline Observatory, surging past yet another climate milestone. This is the sixth consecutive year of steep global increases in concentrations of the greenhouse gas, scientists from NOAA and Scripps Institution of Oceanography announced today.
Carbon dioxide levels are tracked closely by the world’s scientists as a measure of how human activity is changing the planet’s atmosphere. The concentration of CO2 in the atmosphere increases every year, and the rate of increase is accelerating. While it averaged about 1.6 ppm per year in the 1980s and 1.5 ppm per year in the 1990s, the growth rate increased to 2.2 ppm per year during the last decade.
http://www.noaa.gov/news/carbon-dioxide-levels-breach-another-threshold-at-mauna-loa