Environmental Science
Lead poisoning

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

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Environmental Science
Low clouds retard surface cooling at night better than clear skies because:

The clouds absorb and radiate infrared energy back to earth
The clouds are better conductors of heat than is the clear night air
The clouds start convection currents between them
The formation of the clouds releases latent heat energy
The water droplets in the clouds reflect infrared energy back to earth

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