Phytoremediation is

a. rotating crops so that soil minerals are replenished.
b. replacing eroded topsoil so that plants can grow in the soil again.
c. plowing under all or parts of crops to improve the soil.
d. the use of plants to remove pollutants from the environment.
e. replacing unwanted plants with plants useful to humans.


D

Biology & Microbiology

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The Hubbard Brook Watershed project measured all of the following EXCEPT

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