Atmospheric CO2 Hits 414 PPM

Carbon dioxide (CO2) is an important heat-trapping (greenhouse) gas, released through human activities such as deforestation and burning fossil fuels, as well as natural processes such as respiration and volcanic eruptions. The first graph shows atmospheric CO2 levels measured at Mauna Loa Observatory, Hawaii, in recent years, with average seasonal cycle removed. The second graph shows CO2 levels during the last three glacial cycles, as reconstructed from ice cores. - NASA ​Link