The reaction of automobile exhaust and ultraviolet light
A) produces industrial smog.
B) is affecting the stratospheric ozone concentration.
C) forms smoke and fog.
D) produces photochemical smog.
D
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A ____ is a type of volcano that has a steep-sided slope near its summit but a decreasing slope toward the base
A)shield volcano B)cinder cone C)fissure volcano D)composite volcano E)lava dome
By examining the relationships between population growth and grain and meat production, one can see that
A) global grain production will increase if the global consumption of meat increases. B) more grains should be directed into food for livestock to alleviate global hunger. C) global grain production has not kept up with population growth. D) eating less meat will make more grain available for human consumption.
The EPA is authorized by the Toxic Substances Control Act (TSCA) to test the safety of chemicals used in bulk in the manufacturing of products
When passed, these regulations required the testing of existing and new chemicals when there are indications of potential risks. Since TSCA was passed, the EPA has A) reversed this guideline, requiring the testing only for substances that are known carcinogens. B) tested and banned more than 300 new and existing substances. C) tested the safety of about half of the 80,000 chemical substances in the inventory. D) tested the safety of less than 1% of the chemical substances in the inventory.
An aqueous-phase leachate plume will always move in the direction of:
a. decreasing hydraulic gradient b. increasing hydraulic gradient c. decreasing hydraulic conductivity d. increasing hydraulic conductivity