While halting warming is important, a Solar shade is an absolutely terrible way to do that. Shading out 2% of the light has obvious implications for global crop yields and for non crop plants that all rely on solar energy. It would also obviously reduce efficiency of solar electric power collectors, impeding their ability to replace fossil fuels. Global warming is a big problem, but a global food crisis is an even bigger one. A solar shade would buy time on the global warming problem while also creating a much bigger problem.