I don't know anything about this, but I was surprised to read about the light sails proposal for heating Mars.

> Mere dozens of such Starship launches would be needed to substantially increase net insolation on Mars and begin raising the temperature, without the emplacement of any surface infrastructure.

Heating sounds like a good step, but aren't the major challenges a lack of atmosphere and magnetosphere? Having one without the others seems a bit useless to me. What am I missing?