I think there are some proposals based on geoengineering. A widely discussed one is the stratospheric aerosol injection [1]. The concern is that no one knows the unintended consequences of this approach.

Generally speaking, it's not possible to control the planet's temperature. All solutions are focused on either greenhouse gas emissions, or solar radiation management. [2]

[1] https://en.wikipedia.org/wiki/Stratospheric_aerosol_injectio...

[2] https://en.wikipedia.org/wiki/Solar_radiation_management