Researchers have been puzzled by rising levels of trichlorofluoromethane (CFC-11), but a new study suggests the Chinese provinces of Shandong and Hebei are the source
source: newscientist.com
Researchers have been puzzled by rising levels of trichlorofluoromethane (CFC-11), but a new study suggests the Chinese provinces of Shandong and Hebei are the source