Natural event

Natural event means an event and its resulting emissions, which may recur at the same location, in which human activity plays little or no direct causal role. For purposes of the definition of a natural event, anthropogenic sources that are reasonably controlled shall be considered to not play a direct role in causing emissions.

Source

40 CFR § 50.1

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Scoping language

As used in this part, all terms not defined herein shall have the meaning given them by the Act.

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