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Posted
Aug 21, 2014
Physical Climate, Observations, Modeling, Mitigation, Carbon Cycle

Ozone-Depleting Chemical Persists in Atmosphere, Source Unknown

NASA image of the ozone hole over Antarctica
New NASA research shows that Earth's atmosphere contains an unexpectedly large amount of carbon tetrachloride (CC14), an ozone -depleting chemical that was banned worldwide decades ago. According to the study, global emissions of CCl4 average 39 kilotons per year—approximately 30 percent of peak emissions prior to its banning.
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