Environmental Science
Lead poisoning

increases O2 carrying capacity of myoglobin in muscles
reduces O2 carrying capacity of hemoglobin in blood
reduces O2 carrying capacity of myoglobin in muscles
increases O2 carrying capacity of hemoglobin in blood

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Environmental Science
Frost forms when:

Objects on the ground cool below the dew point temperature.
Water vapor changes into ice without first becoming a liquid.
All of these
The dew point is 32oF or below.

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