♻️ap environmental science review

Carbon Monoxide (CO)

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025

Definition

Carbon monoxide is a colorless, odorless gas that is produced by the incomplete combustion of fossil fuels. It can be harmful to humans and animals because it binds to hemoglobin in our blood, reducing its ability to carry oxygen.

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