What is the expansion ratio of water?
a. 580:1
b. 1700:1
c. 325:1
d. 70:1
Answer: b. 1700:1
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Your book states that a "sewage treatment plant removes 70% of the phosphorus and 50% of the nitrogen that flows through it". According to the Law of Conservation of Matter, there is no detectable increase or decrease in the quantity of matter during an ordinary chemical change. Assuming that only ordinary chemical changes occur in sewage treatment plants, how is the nitrogen removed?
A. denitrification B. nitrogen fixation C. biodegradation D. combustion
The action of processing plastic or aluminum cans into another usable product is called ____________________
Fill in the blanks with correct word
Why do U.S. economists commonly refer to externalities as an example of market failure?
A. firms that are required to pay social costs of externalities produce more B. externalities present a case where markets consider all social costs C. externalities present a case where markets only consider some social costs D. firms avoid having to pay social costs of externalities by lowering prices
Using recycled materials utilizes about as much energy as required to process virgin ore.
Answer the following statement true (T) or false (F)