Also known as: co.
CO has various meanings in the Environment category. Discover the full forms, definitions, and usage contexts of CO in Environment.
Carbon monoxide is a colorless, odorless, and tasteless gas that is slightly less dense than air. It is toxic to humans when encountered in concentrations above about 35 ppm, although it is also produced in normal animal metabolism in low quantities, and is thought to have some normal biological functions.
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