Oceans Facing Carbon Rates Which Spurred Mass Die-Off 250 Million Years Ago

University of Edinburgh researchers warn that the carbon emissions that drove a mass extinction event some 252 million years ago were released at a rate similar to today

http://www.commondreams.org/news/2015/04/10/oceans-facing-carbon-rates-which-spurred-mass-die-250-million-years-ago