Heat wasn't the only arena where records were set: Preliminary data from NOAA suggests that 2015 saw the biggest single - year leap in global carbon dioxide levels, and Arctic sea ice saw a record low winter maximum and its fourth lowest summer minimum. (wxshift.com)
Yesterday, NOAA scientists reported that in March 2015 the monthly average global carbon dioxide level went above 400 parts per million for the first time. (climate.gov)
Because of the precipitous rise of global carbon dioxide levels, photosynthesizing grasses have an improved food source. (nextbigfuture.com)