The School of Environmental Science and Engineering cooperates with multiple parties to reveal the potential impact of methylene chloride emissions on the recovery of the Antarctic ozone hole

The international community has achieved the global elimination of ozone-depleting substances such as chlorofluorocarbons (CFCs) and halons through the implementation of the "Montreal Protocol" reached in 1987, and the ozone concentration in the stratosphere is gradually recovering

The School of Environmental Science and Engineering has cooperated with multiple parties to use top-down emission estimation research methods to quantify methylene chloride emissions on a global and Chinese scale, and predict the impact of continued methylene chloride emissions on the restoration of the ozone layer

Global and Chinese methylene chloride emissions

Dichloromethane is a widely used chemical product.

Research results to " Rapid Increase in Inferred Dichloromethane Emissions from China through Atmospheric Observations " was published in "Nature Communications" (on December 14, 2021 online Nature Communications )

Research background: The School of Environmental Science and Engineering, Peking University has long been committed to research and decision-making support for the protection of the ozone layer