Apparently it took a while for scientists to remember that plants need sunlight. >_< I can't make this shit up. I have pointed this out every time someone has suggested geoengineering. Obviously if you reduce sunlight you'll hurt the plants. Plus any additional damage done by whatever crud is used to block the sunlight. Plus the insanely high risk of tinkering with a system that we don't know exactly how it works and have already damaged in multiple ways. The latter may be debatable. But everyone knows that plants need sunlight and less sunlight is bad for plants ... after they're reminded of it.