Gaseous emissions and surfactants resulting from the decay of the logs can cause the foamy wake reported in some sightings.

His gaseous emissions have been known to destroy houses and other hard-surfaced articles, as well as injure people.

This leaner mixture results in the engine having better fuel economy as well as less gaseous emissions.

Its gaseous emissions are composed of 22% methane, 19% sulfur, 12% naphthalene, 10% argon, 6% isobutane, 2% xylene, and 29% unknown gases.

Some thermal desorption systems recycle the carrier gas, thereby further reducing the volume of gaseous emissions.