The bubble concept is a method for determining total emissions in one area. It involves grouping all emissions sources within a facility and setting an overall emissions limit for the entire facility, rather than individual limits for each source. This allows for more flexibility in compliance and can result in a net reduction of emissions.

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The Bubble Concept

Question 28

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) refers to the plant with the greatest amount of room to improve.

Correct Answer: