Stratospheric Aerosol Injection

  • As climate change accelerates and global emissions continue to rise, researchers are revisiting a controversial idea — cooling the planet by injecting sunlight-reflecting particles into the atmosphere.
  • Stratospheric Aerosol Injection (SAI) is a proposed climate intervention that involves spraying reflective particles like sulphur dioxide into the stratosphere to reduce the amount of sunlight reaching Earth’s surface.
  • The technique is inspired by volcanic eruptions, which have historically caused temporary global cooling by releasing aerosols into the upper atmosphere.
  • Most SAI models recommend injecting aerosols at high altitudes (above 20 km) near the equator, which requires specially designed aircraft.
  • Simulations using ....
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