What colourless/colorless, odourless/odorless, poisonous polluting gas is chiefly emitted by small engines typically used in lawn-mowers and chainsaws, etc?
Carbon monixide Carbonic oxide Carbonic Oxide Carbon mono-oxide Koch-Haaf reaction Carbon monoxide Carbon Monoxide Koch–Haaf reaction
carbonic oxide carbon mono oxide carbon monixide carbon monoxide koch haaf reaction koch–haaf reaction
carbon monoxide
WikipediaEntity
Carbon monoxide