Source: Yahoo News – Science

Mike Nelson’s weather forecasts on May 7, 2019 included more than powerful storm fronts, thick fog, and flurries of snow. The veteran meteorologist’s Denver television broadcasts, delivered three times a day, flashed the planet’s current level of carbon dioxide — a potent heat-trapping gas — on the screen. This number, which is now flirting with a historically unprecedented 415 parts per million (ppm), is easily the highest it has been on…