Issue Date: September 1, 2014
Carbon Tetrachloride Emissions Continue Despite Ban
To protect Earth’s ozone layer, most uses of carbon tetrachloride were banned years ago. According to reports filed by countries around the world, emissions of this ozone-depleting substance were virtually nil since 2007. But researchers now estimate that some 39,000 metric tons of the chemical were released each year from 2000 to 2012.
“We are not supposed to be seeing this,” says Qing Liang, a NASA atmospheric scientist who led an international . . .
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