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Stratospheric barrier to curb warming

  • Category
    Environment
  • Published
    6th Dec, 2018
  • According to a study by U.S. scientists, spraying sun-dimming chemicals high above the earth to slow global warming could be “remarkably inexpensive”, costing about $2.25 billion a year over a 15-year period.
  • The geo-engineering technique known as stratospheric aerosol injection (SAI) could limit rising temperatures that are causing climate change.

Context

  • According to a study by U.S. scientists, spraying sun-dimming chemicals high above the earth to slow global warming could be “remarkably inexpensive”, costing about $2.25 billion a year over a 15-year period.
  • The geo-engineering technique known as stratospheric aerosol injection (SAI) could limit rising temperatures that are causing climate change.
  • Aim: To cut the rate of temperature change by half.
  • Discounting other methods of deployment because of cost and feasibility, the research assumes a special aircraft can be designed to fly at an altitude of about 20 km and carry a load of 25 tonnes.
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