According to Geoengineering treatment stratospheric aerosol injection climate change study

Planes spraying tiny sulphate particulates into the lower stratosphere, around 60,000 feet up. The idea is to help shield the Earth from just enough sunlight to help keep temperatures low.

The researchers examined how practical and costly a hypothetical solar geoengineering project would be beginning 15 years from now. The aim would be to half the temperature increase caused by heat-trapping greenhouse gases.

Can spraying these sulphate particulates in the upper atmosphere to lower Earth's temperature have side effects?

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    $\begingroup$ Let me rephrase your question: "Can meddling with processes we do not completely understand have side effects?" The answer is: Yes. Every current concept of geoengineering is not fully researched and understood, thus potentially harmful to our ecosystem and climate. If, and only if, we'd be able to revert any geoengineering, we should think about doing it. $\endgroup$ – Erik Mar 4 '19 at 10:12
  • $\begingroup$ en.wikipedia.org/wiki/Acid_rain $\endgroup$ – jean Mar 7 '19 at 20:23

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