Stratospheric Aerosol Injection (SAI)

Stratospheric Aerosol Injection (SAI): Recently, scientists have started exploring geoengineering methods like Stratospheric Aerosol Injection (SAI) as a new way to help cool the Earth, as global temperatures continue to rise.

• About SAI: A geoengineering technique that involves releasing reflective particles, such as sulphur dioxide, into the stratosphere (10–50 km above Earth’s surface).

o Goal: To reflect a portion of incoming sunlight back into space to reduce global temperatures.

o It mimics the cooling effect observed after major volcanic eruptions.

o Falls under the broader category of Solar Radiation Management (SRM) techniques.