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All of the following are recognised aims of weather modification programmes EXCEPT

  • A.dispersing supercooled fog at an airfield
  • B.changing the prevailing wind direction over a region
  • C.enhancing the precipitation falling over a water supply catchment
  • D.suppressing hail over agricultural farmland

Answer: B

Nothing in the technology acts on the large scale circulation, which carries energy far beyond any seeding intervention. The other three are the standard operational objectives. All three act locally on cloud rather than on circulation.

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