Today, the concentration of carbon dioxide in the atmosphere is at - TopicsExpress



          

Today, the concentration of carbon dioxide in the atmosphere is at 400 ppm – a level not seen on this planet since the Pliocene epoch, nearly 3 to 5 million years ago when the average global temperature of the planet was 2-3 C degrees warmer than today. The International Energy Agency has recently warned that the planet is on track for 3.6 to 5.3 C degrees warming. This is catastrophic – most scientists have recognized any significant rise above 1 C will usher in irreversible changes that will threaten nearly all biological life on this planet.
Posted on: Wed, 22 Jan 2014 22:40:26 +0000

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