Environmental Science
Mobile combustion accounts

40-50% of air pollution
5-10 % of air pollution
10-20% of air pollution
50-60 % of air pollution

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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
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

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