Are ozone-depleting substances also greenhouse gases?

As for greenhouse gases, the most well-known ozone depleting substances are chlorofluorocarbons (CFCs). These gases were present in the atmosphere in relatively small amounts, so their contribution to ozone depletion was significant but their contribution to the greenhouse effect was not.

Since ozone depletion can be thought of as a kind of chain reaction, amounts of CFC that would have had little to no effect on global warming instead had a massive impact on ozone depletion. Essentially, one molecule of CFC can initiate the depletion of 100,000 molecules of ozone.

However, the use of CFCs as propellants was phased out about 20 years ago.

Yes, ozone-depleting substances (ODS) are not considered greenhouse gases. While they can have an indirect impact on climate change by contributing to ozone depletion in the stratosphere, they do not exhibit the same properties as greenhouse gases in terms of trapping heat in the Earth's atmosphere. Greenhouse gases, such as carbon dioxide, methane, and water vapor, absorb and emit infrared radiation, leading to the greenhouse effect and subsequent warming of the planet. ODS, on the other hand, primarily deplete ozone molecules in the stratosphere, which can result in increased ultraviolet radiation reaching the Earth's surface.