Synthetic gases cut benefit of CFCs ban

摘要

The global warming impact of 25 widely used synthetic greenhouse gases, some of which replaced those that have already been outlawed, could outweigh the benefits from the phasing out of the earlier gases, re-sesarch led by Bristol University has concluded. Chlorofluorocarbons or CFCs, which were used in refrigerators and air conditioners, gained public attention for their role in creating a hole in the ozone layer over Antarctica and were phased out following the Montreal Protocol in 1987. But other synthesised gases that replaced them can still be harmful to the ozone layer and are greenhouse gases that contribute to climate change. Despite this, synthetic greenhouse gases, or SGHGs, beyond CFCs have received relatively little attention from the research community.