What explains why leachate is a problem in sanitary landfills?
A. mixes with municipal waste and produces poisonous gasses that escape from the landfill.
B. slows down the natural decomposition of municipal waste.
C. reduces the ability of municipal trash to be compacted.
D. picks up toxic chemicals from municipal waste and causes groundwater contamination.
E. all of the answers listed here.
Answer: D
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A(n) ____________________ is a set of organisms within a defined area or volume that interact with one another and with nonliving matter in their environment.
Fill in the blank(s) with the appropriate word(s).
The source of electrons in a common electric circuit is
A. a generator at the power station. B. usually a wall socket. C. a dry cell, wet cell, or battery. D. the electric conductor itself.
Developed countries spend just over $2,000 per person annually on health care, compared to approximately $1600 per person in developing countries
Indicate whether the statement is true or false.
The primary purpose of a radiosonde is:
A) to report data about surface conditions at an automated weather station. B) to compile data from thousands of automated weather stations into one file. C) to calculate numerical predictions of weather. D) to acquire data about conditions in the upper atmosphere.