Climate Change Mass Extinction

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Thu02222018

Last updateSat, 21 Feb 2015 7pm

Carbon dioxide now at highest level in 5 million years

For the first time in roughly 5 million years, the amount of carbon dioxide in the Earth's atmosphere is forecast to top 400 parts per million next month throughout much of the Northern Hemisphere. -- Carbon dioxide is the greenhouse gas that is responsible for 63% of the warming attributable to all greenhouse gases, according to the National Oceanic and Atmospheric Administration's Earth System Research La

http://www.usatoday.com/story/weather/2013/04/24/carbon-dioxide-keeling-curve-global-warming/2110445/