There are several effects this could have on Earth and the atmosphere. The presence of these particles could affect how water freezes into ice in the stratosphere, and influence the size of stratospheric aerosol particles. They could also induce salt deposition on aerosol particles, and alter the stratospheric refraction of light.

These may seem like subtle changes, but they could have unintended consequences that we really ought to investigate, the researchers say.

Link here

Few months ago an article was published about how the rockets was warming the upper atmosphere and it was bad for it.