Environmental Science
Carbon dioxide is called greenhouse gas because it is

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

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Environmental Science
The wind direction is:

Always directly from low toward high pressure
The direction to which the wind is blowing
The direction from which the wind is blowing
Always directly from high toward low pressure

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