Human-induced pollution enters the atmosphere from both ____
A) fixed and natural sources
B) natural and secondary sources
C) fixed and mobile sources
D) natural and primary sources
C
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The reduction of outdoor air pollution in the United States has been so successful because:
a. The U.S. Congress supported it and diligently crafted laws to ensure its success. b. U.S. citizens insisted that the laws be passed. c. The country is affluent enough to afford the controls and improvements it required. d. All of these answers are correct. e. Only U.S. citizens insisted that the laws be passed and the country is affluent enough to afford the controls and improvements it required are correct.
Which way is the current moving along this coastline?
A) Out to sea
B) In toward the coast
C) From right to left
D) From left to right
A factor that reinforced suburban sprawl was
A) low mortgage interest rates. B) loan guarantees provided by the federal government. C) property tax reductions for owner-occupied housing. D) cheap transportation. E) all of the above
The relative ease with which water moves through void spaces in Earth's material is called _______________
Fill in the blank(s) with correct word