Coal mines and coal processing facilities are required to minimize the amount of coal dust emitted during mining, processing, and transporting the coal. The regulations controlling coal dust emissions would mainly prevent ________
A) wasting coal that can be reclaimed and burned to produce electricity
B) coal "fog" that can cause traffic fatalities
C) lung damage to those working at the plant and living nearby
D) acid precipitation in the region
C
Environmental & Atmospheric Sciences
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Scientific evidence suggests that Earth formed approximately ____________ ago
a. 4.6 trillion years d. 4600 years b. 4.6 million years e. 460 years c. 4.6 billion years
Environmental & Atmospheric Sciences
This map is commonly used to represent conditions in the middle atmosphere
A) 200 mb B) 500 mb C) 700 mb D) 850 mb
Environmental & Atmospheric Sciences
How much do mountains rise with each addition of 1000 meters of crustal material?
A. 2 meters B. 200 meters C. 20 meters
Environmental & Atmospheric Sciences
Free oxygen was a common constituent of the Earth's early atmosphere
a. true b. false
Environmental & Atmospheric Sciences