Effluvium (noun)

1. An outflow or emission of gas, vapor, or other substances.
2. A noxious or unpleasant odor or emanation.
3. A waste product or by-product.

Origin:

From latin effluvium, from effluere (to flow out), from ex- (out) + fluere (to flow).

Examples:

1. The effluvium from the factory was a health hazard for nearby residents.
2. The effluvium from the sewage treatment plant was a source of constant complaints.
3. The effluvium from the garbage dump was a potent contributor to the greenhouse effect.
4. The effluvium of the vehicle's exhaust was a visible sign of its lack of emissions controls.
5. The effluvium of the decaying matter was a feast for the scavengers.