I did a short investigation (Wikipedia) and came up with the following albeit incomplete list of geoengineering schemes:
•Sulfur aerosols sprayed in stratosphere
•Ocean iron fertilization
•Marine cloud brightening
•Deforestation of snowy landscapes to expose snow and reflect sunlight
•Tiny metal flakes added to jet fuel
•Adding silicon compounds to jet fuel
•Ships spraying seawater to create clouds
•Billions of aluminized, hydrogen balloons to reflect sunlight
•Orbiting mirrors space mirrors.
•Mining moon dust to create a shielding cloud
•Orbiting space lenses
•Biochar - Turn the rainforest into charcoal and bury it.
Hmmmm, I guess I like Mining Moon Dust the best, although cutting down the rain forests and burying them as charcoal may not roll off the tongue as well, but it's right in there in the running along with the Electric Trees.
As Rush Limbaugh says, you can't make this stuff up.