Environmental Science
Carbon dioxide is called greenhouse gas because it is

Transparent to heat but traps sunlight
Used in green-house to increase plant growth
Transparent to sunlight but traps heat
Transparent to both sunlight and heat

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Environmental Science
Lead poisoning

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

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