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Cirrus thinning has been proposed as a means of

  • A.suppressing the hail produced by severe storms
  • B.allowing more infrared radiation to escape to space
  • C.reflecting rather more of the incoming sunlight back out to space
  • D.increasing the rainfall over arid regions

Answer: B

Thin cirrus warms the surface by trapping outgoing infrared more than it reflects sunlight. Seeding to reduce its coverage would therefore act on the longwave side of the energy budget. Most other proposals act on incoming sunlight instead.

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