Pleistocene Park seems like great idea, but unfortunately they do not have plans to use it for meat production, which could dramatically increase the speed of c

Pleistocene Park seems like great idea, but unfortunately they do not have plans to use it for meat production, which could dramatically increase the speed of conversion of the tundra to grassland, and save the tropical forests. And this seems to be the problem with other suggestions too, they are not ambitious enough! At this level of CO2, reducing it is not a very pressing goal to most of the people. But there is another issue: weather is bad over most of the earth without any climate change, and fixing it would provide immediate benefits to larger number of people, and fix climate change as a side effect, because if we can restore the deserts to a moderately green state, their biosphere would consume all of the CO2 that we have released so far. A very promising way to build weather controlling machine is building large number of autonomous hot air balloons, which can be used to change the local temperature in several ways: if covered with reflective material they can create shadow; if covered with dark material they can significantly increase the temperature above the cloud potentially dispersing the cloud; if combined into a structure similar to a solar updraft tower, they can transport dust and humidity to the height where they would not be transported by natural winds and by that either condensate the water or create new clouds. With a large enough number of devices like this it should be possible to guide humid air to deserts, or to prevent hurricanes by removing convective available potential energy on their path. And unlike sunshade in the space proposals, these would not require huge effort by the whole planet to become useful, for instance relatively small installations, affordable to the local population, can be used to create more sunny days in Amsterdam, or more clouds in Dubai.