Assertion: chlorofluorocarbon | /r/HasProperty | developed in early 20th century
Facets:
Source sentences:
text: Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) were developed in the US in the early 20th century and became widely used as refrigerants and for making plastic foams producing refrigerators and freezers until the early 1990s, when it was found that these chlorinated gases damaged the ozone layer.
text: Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) were developed in the US in the early 20th century and became widely used as refrigerants and for making plastic foams producing refrigerators and freezers until the early 1990s, when it was found that these chlorinated gases damaged the ozone layer.
text: Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) were developed in the US in the early 20th century and became widely used as refrigerants and for making plastic foams producing refrigerators and freezers until the early 1990s, when it was found that these chlorinated gases damaged the ozone layer.
text: Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) were developed in the US in the early 20th century and became widely used as refrigerants and for making plastic foams producing refrigerators and freezers until the early 1990s, when it was found that these chlorinated gases damaged the ozone layer.