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Stratospheric aerosol injection (SAI) is a proposed method of solar geoengineering (or solar radiation modification) to reduce global warming. This would introduce aerosols into the stratosphere to create a cooling effect via global dimming and increased albedo , which occurs naturally from volcanic winter . [ 1 ]
There is a risk that countries may start using SRM without proper precaution or research. SRM, at least by stratospheric aerosol injection, appears to have low direct implementation costs relative to its potential impact, and many countries have the financial and technical resources to undertake SRM. [6]
Maternal PM 2.5 exposure during pregnancy is also associated with high blood pressure in children. [219] Inhalation of PM 2.5 – PM 10 is associated with elevated risk of adverse pregnancy outcomes, such as low birth weight. [220] Exposure to PM 2.5 has been associated with greater reductions in birth weight than exposure to PM 10. [221]
Giant sun shades, 40-foot-tall air filters, stratospheric sulfur injections: Here are some of the wild and wondrous ways we might save the planet. New scientific interventions are here to fight ...
The term refers to activities like stratospheric aerosol injections, an untested theory that the planet could be cooled by spraying particles into the stratosphere from high-altitude aircraft.
Enhancing the solar reflectance and thermal emissivity of Earth in the atmospheric window through passive daytime radiative cooling has been proposed as an alternative or "third approach" to climate engineering [26] [50] that is "less intrusive" and more predictable or reversible than stratospheric aerosol injection. [51
While these methods were less intrusive and less potentially damaging than stratospheric aerosol injection, they could prove more expensive and too energy-intensive, said Benjamin Sovacool ...
Stratospheric aerosol injection could be very effective at stopping or reversing warming but it would also have substantial effects on the global water cycle, regional weather, and ecosystems. Furthermore, it would have to be carried out over centuries to prevent a rapid and violent return of the warming.