At some point we will need to take an active part in regulating the planet's weather and various climates. Orbiting solar panels on orbits that pass between us and the sun, that can be selectively turned edge on, or perpendicular, to the sun, would let us control solar influx to particular surface regions, limiting energy input in specific places while also harvesting that energy and enabling us to put it to use as needed without increasing total energy/heat input.