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State whether the following is true or false.
A single unusually cold winter is evidence against a warming climate.

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

Answer: B

Climate is a statistical description and individual seasons vary widely about the mean. Only a trend over many years carries information about the climate itself. Variability is expected. One season carries almost no information at all.

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