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Overseeding a cloud refers to

  • A.using more than one agent at the same time
  • B.seeding a cloud that is already precipitating heavily
  • C.adding so many nuclei that all crystals stay small
  • D.seeding a cloud more than once in a season

Answer: C

With too many crystals competing for the available vapour none grows large enough to fall. The idea underlies attempts at hail suppression as well as being a risk in rain enhancement. Too much agent can be worse than none at all.

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