What chemical, other than chlorine, has been shown to cause damage to the ozone layer?

Bromine is recognized as a significant ozone-depleting substance alongside chlorine. It has a much greater ozone-depletion potential relative to chlorine, which means that even in smaller amounts, bromine can cause severe damage to the ozone layer. This is due to its ability to catalyze the breakdown of ozone molecules in the stratosphere effectively.

Bromine-containing compounds, such as methyl bromide, have been regulated through international agreements like the Montreal Protocol, which addresses the reduction of substances harmful to the ozone layer. The chemical's behavior in the atmosphere allows it to persist and contribute to ozone depletion over time, similarly to chlorine compounds. The understanding of bromine's impact on the ozone layer plays a vital role in the ongoing efforts to protect this critical aspect of Earth's atmosphere.

Other chemicals listed do not exhibit the same level of effectiveness in ozone depletion when compared to bromine.