Assertion: chlorofluorocarbon's emission | /r/HasProperty | 180±60 gtc
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Source sentences:
text: Total cumulative emissions from 1870 to 2017 were 425±20 GtC (1539 GtCO 2 ) from fossil fuels and industry, and 180±60 GtC (660 GtCO 2 ) from land use change.