二氧化碳跨越400ppm! CO2 surpassed 400ppm!

  二至四百萬年來首次跨越400ppm(百萬份之四),上升速度越來越快!! For the first time in two to four million years, CO2 level surpassed 400 parts per million (ppm), at a faster and faster rate!! 原文在此 original article here co2_weekly_NOAA