Carbon dioxide levels are reaching heights we haven't seen in 800,000 years
October 30, 2017, 11:08 a.m. by Noel Kirkpatrick
CO2 concentration in the atmosphere saw a sizable jump between 2015 and 2016.
Plants may be wising up faster than humans to the dangers of global warming
July 29, 2017, 12:30 p.m. by Christian Cotroneo
Scientists say vegetation is adapting to soak up more carbon dioxide and use less water.
Carbon dioxide in Earth's atmosphere just reached a major milestone
September 29, 2016, 9:36 a.m. by Russell McLendon
CO2 data from Mauna Loa in Hawaii suggest 400 ppm is the new normal.
As U.N. makes history on Earth Day, Leonardo DiCaprio reminds us not to rest on laurels
April 22, 2016, 2:31 p.m. by Russell McLendon
More than 170 world leaders signed the Paris Agreement on Earth Day 2016, but that's just the beginning.