The bubble concept is a method for determining total emissions in one area, where emissions from individual sources are combined (or "bubbled") to determine whether the total amount of emissions meets federal standards under the Clean Air Act. It is not related to controlling new factories or identifying dirty areas. Therefore, option A and B are not correct.

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The Bubble Concept

Question 40

Multiple Choice

The bubble concept:

A) refers to dirty areas that do not meet federal standards under the Clear Air Act.
B) controls whether new factories can be built in a nonattainment area.
C) is a method for determining total emissions in one area.
D) all of the above.

Correct Answer: