This article discusses the impact that aerosols are having on climate change. Here are some quoptes from the article:
“aerosols … [are] microscopic particles of pollution that, on balance, reflect sunlight back to space and help cool the planet down, providing a crucial counterweight to greenhouse-powered global warming.”
“But there’s a catch. Our surplus of aerosols is a huge problem for those of us who like to breathe air. At high concentrations, these tiny particles are one of the deadliest substances in existence, burrowing deep into our bodies where they can damage hearts and lungs.”
So dumping a huge amount of aerosols into the atmosphere to reduce global warming is simply not feasible. It would kills us, albeit, slowly.