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State whether the following is true or false.
Global precipitation and evaporation must balance in the long term.

  • A.False only at small scales
  • B.True
  • C.False
  • D.True only at large scales

Answer: B

Water is conserved, so what falls must have evaporated, and the atmosphere holds only a few days worth of it. Regional imbalances are made up by the transport of vapour and the return flow of rivers. The atmosphere stores only days of it.

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