Detectives have sniffed out a big source of an outlawed, invisible, and odorless gas, currently wafting through Earth's atmosphere. This chemical, CFC-11, is illegal everywhere in every country, because it depletes Earth's ozone layer — which protects life from solar radiation.
The detectives are a team of global scientists who exposed specific provinces in eastern China that are responsible for emitting loads of this ozone-killing gas into the atmosphere since 2013. The researchers published a study on Wednesday in the journal Nature, describing how they used detection instruments to sleuth out major sources of this banned chemical, without stepping foot in China. Read more...
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