Assertion: acetaldehyde | /r/CapableOf | enter canadian environment
Facets:
value: through secondary formation
type: MANNER
value: from natural and anthropogenic combustion sources
type: CAUSE
value: from industrial on-site releases
type: CAUSE
Source sentences:
text: Acetaldehyde enters the Canadian environment from natural sources (including forest and brush fires), from human sources such as fuel combustion and industrial on-site releases, and through secondary formation as a result of the atmospheric oxidation of natural and anthropogenic organic compounds.
text: Acetaldehyde enters the Canadian environment mainly from natural and anthropogenic combustion sources, notably vehicle emissions, from industrial on-site releases and through secondary formation as a result of the oxidation of anthropogenic and natural organic compounds in air.