Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Biodiversity is the term for the measurement of the amount of variation of species in a given area.

Answer: What is the term for the measurement of the amount of variation of species in a given area?

Question: The love canal tragedy was an infamous example of industrial waste dumping.

Answer: Love canal was an infamous example of what type of pollution?

Question: Adding the number of protons plus the number of neutrons in an atom decides its approximate mass; atomic number is another word for this value.

Answer:
Adding the number of protons plus the number of neutrons in an atom, decides it's approximate mass, what is another word for this value?