The Pliocene called. It wants its CO2 levels back.
May 8, 2015, 11:24 a.m. by Russell McLendon
Earth's atmosphere hasn't had this much CO2 in human history, and possibly not since the Pliocene Epoch about 3 million years ago.
Michael Bloomberg gifts Sierra Club $30M to fund anti-coal efforts
April 8, 2015, 11:28 a.m. by Michael d'Estries
Billionaire philanthropist and former mayor says he's 'doubling down' on efforts to reduce carbon emissions and to replace half the nation's coal with clean energy by 2017.
Greenhouse effect is observed and getting worse
February 26, 2015, 3:27 p.m. by Becky Oskin, LiveScience
Researchers used powerful spectrometers to monitor and track how much infrared radiation was being trapped inside the Earth's atmosphere.
Did ocean's big CO2 burps end last ice age?
February 12, 2015, 10:56 a.m. by Becky Oskin, LiveScience
Scientists are not sure what caused these releases of carbon dioxide, with theories ranging from changes in ocean currents to more active underwater volcanoes.
Turtle 'marriage' ends after 115 years
'Signing Day' recognizes high school seniors starting jobs, not college
Dazzling blue clouds mark the first breath of newborn stars
Honey badger fights leopard to rescue her baby
Geese with ice-covered beaks get a helping hand from humans
59 endearing names for baby animals