The best way to reduce the pollution of agricultural fertilizer runoff from farm fields is to
A) treat the water before it reaches streams or rivers.
B) reduce the amount fertilizer leaving the farm fields through such techniques as no-till cultivation.
C) add chemicals into the rivers and streams that neutralize the fertilizers.
D) raise crops in the rivers and streams that use the fertilizers.
B
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Streams which flow for only a part of the year are ______.
a - antecedent b - dry c - superimposed d - consequent e - intermittent
Halogenated hydrocarbons are some of the most abundant and dangerous synthetic organic compounds found in
marine waters. a. True b. False
What is the world's single largest human-caused source of methane?
A. cattle belching B. flatulence C. pig manure D. melting tundra E. world's largest dams
Measurements of chlorophyll a fluorescence are made at sea to determine the biomass of ________.
A. phytoplankton B. meroplankton C. holoplankton D. meroplankton and holoplankton E. meroplankton, phytoplankton, and holoplankton