SpaceX and Virgin Galactic space ships could destroy the ozone layer again:
Soot particles from the rockets could reverse regrowth of the shield that protects life on Earth from UV rays, study finds
Black carbon particles emitted by rockets are almost 500 times more efficient at holding heat in the atmosphere than all other sources of soot combined
This, in turn, will trap heat inside the ozone layer and add to global warming
The biggest culprits are SpaceX's use of kerosene and Virgin Galactic's hybrid synthetic rubber fuels
https://www.dailymail.co.uk/sciencetech/article-10958381/SpaceX-Virgin-Galactic-space-ships-destroy-Ozone-layer-again.html