Editing Combustion (section)

=====Human health problems=====
Breathing [[carbon monoxide]] causes headache, dizziness, vomiting, and nausea. If carbon monoxide levels are high enough, humans become unconscious or die. Exposure to moderate and high levels of carbon monoxide over long periods is positively correlated with the risk of heart disease. People who survive severe [[carbon monoxide poisoning]] may suffer long-term health problems.<ref>{{cite web|title=Carbon Monoxide Poisoning|date=8 December 2020|url=https://ephtracking.cdc.gov/showCoRisk.action}}</ref> Carbon monoxide from the air is absorbed in the lungs which then binds with [[hemoglobin]] in human's red blood cells. This reduces the capacity of red blood cells that carry oxygen throughout the body.