Worst mass extinction ever caused by CO2, acid in the oceans

[news]

http://i.cbc.ca/1.3028031.1428678096!/fileImage/httpImage/image.jpg_gen/derivatives/16x9_460/australia-ship.jpg Scientists have found the first direct evidence for the cause of the world's worst mass extinction - high carbon dioxide levels in the atmosphere that acidified the oceans.


More... (http://start.westnet.ca/newstempcb.php?article=technology/ocean-acidification-from-co2-blamed-for-world-s-worst-mass-extinction-1.3027938)