A group of scientists who are convinced that trying to reduce CO2 emissions to stave off global warming will not happen soon enough to be effective enough have come up with an alternative plan. The Geoengineering approach would be instead of reducing CO2 in the atmosphere which traps heat from the sun, you simply sprinkle droplets of sulfuric acid in the atmosphere to block a portion of the suns rays from getting in in the first place. I can wrap my head around how that could be effective, but I must say I'm a little uneasy. I need to learn more about the long term effects before I would vote a yea for that idea. Anyway it is interesting.
https://www.scientificamerican.com/article/blocking-the-sun-is-no-plan-b-for-global-warming/"More than 300 watts per square meter of sunshine hits the top of Earth's atmosphere each year. A third is reflected and the sky, sea and land absorb the rest. Much of that warmth tries to escape back to space but only a little over half makes it each year. That proportion is declining as concentrations of gases in the atmosphere, notably carbon dioxide, edges ever upward. The result: global warming.
To a tinkerer's mind there is an obvious solution: block some of that sunlight from coming in. That's the solution known as geoengineering—the large-scale manipulation of the planet’s environment, in this case the sky. As negotiators at the climate talks underway here spar over what to do about adding more CO2 to the air, geoengineering becomes more and more attractive to those with this tinkerer's bent"