In a High-Stakes Environmental Whodunit, Many Clues Point to China
In 1987, global production and use of chlorofluorocarbons (CFCs) was banned by the Montreal Protocol, because they have an overwhelming destructive impact on the ozone layer. Their impact was discovered as a result of the big ozone hole over Antarctica.
Since 2013, there has been a rise in emissions of CFCs. The New York Times exposes their source: factories in China who have ignored the Montreal Protocol.