Environmental Science
An ideal shelter for housing a temperature-measurement instrument should be:

In the shade
Both black and in the shade
Black
Both white and in the shade
White

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Environmental Science
The wind-chill factor:

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

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Environmental Science
Biogas is composed of

methane, carbon dioxide, nitrogen and hydrogen
ethane, carbon dioxide, nitrogen and hydrogen
carbon dioxide, nitrogen and hydrogen
methane, carbon dioxide, nitrogen and sulphur

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