Environmental Science
The most important human activity, leading to the extinction of wildlife, is

Alternation and destruction of the natural habitats
Introduction of alien species
Hunting for valuable wildlife products
Pollution of wildlife, is

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Environmental Science
The earth is tilted at an angle of 23.5o with respect to the plane of its orbit around the sun. If the amount of tilt were increased to 40o, we would expect in middle latitudes:

Hotter summers and colder winters than at present
Hotter summers and milder winters than at present
Cooler summers and colder winters than at present
Cooler summers and milder winters than at present
No appreciable change from present conditions

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Environmental Science
The wind-chill factor:

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

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