[Reeses]

A really good thing about clouds is they are fairly local and soon rain out, so the UN isn't going to find them useful for global control. California could be turned into a rain forest without much effect a few hundred miles away.

An interesting thing about some kinds of ocean algae is if they are bothered by too much UV radiation they emit a chemical that causes water vapor to condense into clouds, which then reduce the UV level. Saltwater algae somewhat regulate their local climate.

Making algae biodiesel in the open ocean could be used to make more freshwater and cool the climate. But the Saudi's are going to hate this particular idea because it would ruin their free ride.

[Boardwalk]

Slow ride