I'm curious. From a global warming + CO2 perspective (and total costs, maybe), are we better off: - by making mirror roofs that bounce as much light as possibl

I'm curious. From a global warming + CO2 perspective (and total costs, maybe), are we better off: - by making mirror roofs that bounce as much light as possible back towards the sky (therefore not trapping heat, and reducing the need for A/C in the summer); - or by using heat-trapping solar roofs that produce electricity but act as heat-sinks and require more A/C usage in the summer? And what about shingles that go from mirror to black from summer to winter, to decrease the need of winter heating as well as summer A/C? What if we take in account the amount of CO2 needed to manufacture the solar roof?