Wood smoke contains dangerous toxins that cause changes in human cells. Because wood smoke presents such a high health risk, legislation is needed to regulate the use of open-air fires and wood burning stoves

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• what's the question ??
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• 1) Wood smoke contains dangerous toxins that cause changes in human cells. Because wood smoke presents such a high health risk,legislation is needed to regulate the use of open air firesand wood burning stoves.
  a) Within the jurisdiction covered by proposed legislation, most heating and cooking is done by oil or natural gas.
  b) Smoke produced by coal burning stoves is significantly more toxic than smoke from wood burning stoves
  c) In valleys wood is used as the primary heating fuel, the smoke results in bad air quality
  d) Amount of toxins present in wood smoke is much less than the amount contained in an equal volume of automobile exhaust.
  
  
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• its option C
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