Which of these is the main type of pollution in coastal waters in the U.S.?
A. nutrients
B. inorganic
C. chemical
D. thermal
Answer: A
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________ is primarily responsible for spreading thousands of invasive alien species around the world.
Fill in the blank(s) with the appropriate word(s).
The largest zone of Earth's interior by volume is:
A. inner core B. outer core C. mantle D. crust
Some coastal fishing communities have developed allotment and enforcement systems for controlling fish catches in which each fisher gets a share of the total allowable catch. These systems, called ____, help sustain fisheries and jobs.
A. cap and trade B. total allowable catch C. co-management D. catch-share E. community-based management
Supercooled water refers to ________
A) ice crystals B) water that is liquid as cold as -40ºC (-40ºF) C) water vapor below freezing D) water droplets without condensation nuclei E) ice crystals that are the beginning of snowflakes