The concern about ozone layer depletion was primarily linked to chlorofluorocarbons (CFCs), which were once used as propellants in aerosol sprays. However, CFCs have been banned in most countries due to their harmful effects on the ozone layer.

Modern spray deodorants generally use different propellants, such as:

* Hydrocarbons: These are considered environmentally friendly as they don't deplete the ozone layer.

* Compressed air: Some spray deodorants use compressed air as a propellant, which is also ozone-friendly.

Therefore, spray deodorants today do not pose a significant threat to the ozone layer.

It's important to note that even though modern spray deodorants are generally safe for the ozone layer, they can still have other environmental impacts, such as:

* Packaging: The plastic packaging and other materials used for spray deodorants can contribute to waste and pollution.

* Chemicals: Some deodorants contain chemicals that could potentially harm aquatic life or contribute to air pollution.

Therefore, it's always a good idea to choose environmentally friendly spray deodorants with minimal packaging and non-toxic ingredients.