Environmental Science
Many wild plant and animals are on the verge of extinction due to

Habitat destruction
Climatic changes
None of these
Non availability of food

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Environmental Science
The wind-chill factor:

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

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