Indirect source

Indirect Source: Any facility or building, property, road or parking area that attracts motor vehicle traffic and, indirectly, causes pollution.
Indoor Air: The breathable air inside a habitable structure or conveyance.

Indirect Source Review: A major component of an indirect source control program which applies to new and modified indirect sources.

Indirect Source Model for Air Pollution
ISO
International Organization for Standardization ...

Industry-specific effluent limitations applicable to direct and indirect sources which are developed on a category-by-category basis using statutory factors, not including water-quality effects.
Teratogenesis ...

The compound is released into the air by direct and indirect sources and breaks down in the lower atmosphere into carbon dioxide, phosgene (carbonic dichloride), and hydrogen chloride.

technology-based standards Effluent limitations applicable to direct and indirect sources which are developed on a category-by-category basis using statutory factors, not including water-quality effects.

See also: Organism, National, Table, Species, Toxic