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Environmental Science

Environmental Science
What is the leading source of energy used in the United States today?

natural gas
nuclear power
oil resources
coal

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Environmental Science
The most abundant greenhouse gas in the earth's atmosphere:

Chlorofluorocarbons (CFCs)
Nitrous oxide (N2O)
Water vapour (H2O)
Carbon dioxide (CO2)
Methane (CH4)

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Environmental Science
The lower limit of water availability in soil is known as

Wilting point
Thermocline
Field capacity
Hypolimnion

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Environmental Science
When the air temperature is below freezing, the saturation vapour pressure over water is .

Equal to the saturation vapour pressure over ice
Equal to zero
Less than the saturation vapour pressure over ice
Greater than the saturation vapour pressure over ice

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Environmental Science
The most abundant gas in the stratosphere is:

Oxygen (O2)
Carbon dioxide (CO2)
Nitrogen (N2)
Ozone (O3)
Chlorofluorocarbons (CFCs)

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Environmental Science
Carbon dioxide is a naturally-occurring component of the atmosphere.

1

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