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Q:

It is dangerous to have carbon monoxide in the atmosphere because

  • 1
    Decreases the organic matter of tissues.
  • 2
    Oxygen present in the body makes carbon dioxide.
  • 3
    Dry the blood.
  • 4
    Combining hemoglobin makes it unfit for oxygen absorption.
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Answer : 4. "Combining hemoglobin makes it unfit for oxygen absorption."

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