One idea being floated by scientists to slow global warming is the creation of a ring containing either small particles or spacecraft that would orbit the Earth. The ring would act to shade the tropical part of the globe thereby cooling the warmest part of the planet.
In the newly outlined approach, reflective particles might come from the mining of Earth, the Moon or asteroids. They’d be put into orbit around the equator. Alternately, tiny micro-spacecraft could be deployed with reflective umbrellas.
I don’t really see this going anywhere, but if global warming continues and people living in coastal areas see their homes disappear into the sea because of melting ice caps I imagine we’ll hear more about it.