The Pliocene called. It wants its CO2 levels back.
May 8, 2015, 11:24 a.m. by Russell McLendon
Earth just averaged 400 parts per million of carbon dioxide for a month, which hasn't happened in human history — and possibly not since the Pliocene Epoch about 3 million years ago.
U.S. and China reach historic deal on climate change
November 12, 2014, 11:14 a.m. by Russell McLendon
In a surprise announcement, Earth's two largest economies revealed a game-changing agreement to cut carbon emissions.
Humans need to ditch fossil fuels by 2100, IPCC warns
November 3, 2014, 3:30 p.m. by Russell McLendon
A major new U.N. climate report outlines what it will take for humanity to save itself from catastrophic climate change.
How much are plants helping us fight climate change?
October 16, 2014, 10:58 a.m. by Russell McLendon
Climate models may be underestimating plants' CO2 intake, a new study finds, but some experts downplay the significance.
Global carbon dioxide emissions reach new high
September 22, 2014, 10:57 a.m. by Becky Oskin, LiveScience
The world has 30 years to reverse the CO2 trend before global warming surpasses the 3.6 degrees Fahrenheit target set at the 2009 climate summit in Copenhagen.