An island nation has a lot of coastal territory and has become gravely concerned about the threat of global warming. They've decided to fix this by launching reflective satellites into orbit -- similar to China's man-made moon plan, but instead of reflecting sunlight to Earth at night, they're reflecting sunlight away from Earth during the day.
Is this viable?
I assume it's not actually viable since real-life geoengineering efforts seem to be mostly interested in adding reflective material to the atmosphere. But what's the problem?
Does it take an unreasonable number of satellites? Are the satellites too expensive even when bulk-manufactured? Are the satellites too expensive to launch into orbit? Do the satellites get damaged too quickly by orbital debris? Is there some sort of weird thing where the satellites act as solar sails and the pressure pushes them out of orbit? Or is it just that the satellites fly over countries that would prefer not to suffer eclipse conditions most of the time?