Anyone ever read anything on the amt of global warming due to heating homes and buildings, running processes, heat absorbing surfaces, etc? What are the adjustments to the historical record, etc? Moreover, say we could adopt say, pure solar based heating, is that a zero sum effect or a net addition to the ambient air temperature?
Eg Take the case where land that was forested or grasslands and is now black dirt part of the year; does that increase global warming or does it make no difference?
Moreover, would/could/should thousands of large reflective space blankets orbiting the earth reflect some sunlight back into space and thus "shade" the earth to reduce global warming?
(At night, they could/might provide more light at dusk and dawn to reduce ground based lighting and thus heating assuming production and use of surface lighting is worse than solar lighting. See the Russian experiment a few years ago.)