Heat waste is absolutely miniscule compared to the amount of energy the Earth receives from the Sun. As in, the Earth is continuously bombarded by 173 petawatts

Heat waste is absolutely miniscule compared to the amount of energy the Earth receives from the Sun. As in, the Earth is continuously bombarded by 173 petawatts of solar radiation. So you can see why it would be worth trading some waste heat to reduce the retention of solar energy in the atmosphere.