Environmental Science
Of the gases listed below, which is not believed to be responsible for enhancing the earth's greenhouse effect?

Chlorofluorocarbons (CFCs)
Nitrous oxide (N2O)
Molecular oxygen (O2)
Methane (CH4)
Carbon dioxide (CO2)

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Environmental Science
The wind-chill factor:

Determines how low the air temperature will be on any given day
Tells farmers when to protect crops from a freeze
Relates body heat loss with wind to an equivalent temperature with no wind
Indicates the temperature at which water freezes on exposed skin
Takes into account humidity and air temperature in expressing the current air temperature

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