Environmental Science
What is "Black Lung"?

Occupational Hazard to the miners
Occupational Hazard to pesticide applicators
None of these
Occupational Hazard to navigators

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Environmental Science
During an equinox:

The earth is not tilted toward nor away from the sun
All of these
The days and nights are of equal length except at the poles
At noon the sun is overhead at the equator

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