Unexpectedly large amount of ozone-depleting compound present in Earth's atmosphere

New NASA research shows that Earth’s atmosphere contains an unexpectedly large amount of an ozone-depleting compound – Carbon tetrachloride (CCl4) – from an unknown source decades after the compound was banned worldwide.Carbon tetrachloride was regulated in 1987 under the Montreal Protocol along with other chlorofluorocarbons that destroy ozone and contribute to the ozone hole over Antarctica. Between 2007 and 2012 all parties to the Montreal Protocol reported zero new CCl4 emissions. However, the new research shows worldwide emissions of CCl4 average 39 kilotons per year, approximately 30 percent of peak emissions prior to the international treaty going into effect.”We are not supposed to be seeing this at all,” said Qing Liang, an atmospheric scientist at NA… »

Source: Solar News

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