CO or CO2?

This month's poll asked about the gas that kills. The answer is carbon monoxide. (CO). According to the online magazine CETCI Magazine, "Carbon monoxide (CO) and carbon dioxide (CO₂) are often mistaken for one another. Both gases are odourless and colorless and target the cardiovascular system. Both gases can enter the body through inhalation, skin and / or eye. Similar symptoms that both gases have in common are headaches, dizziness, seizures, and hallucination."  Carbon monoxide, however, is the more serious of the two and is the one that causes the most deaths. 

A chart on the website mentioned above gives some interesting comparisons of the two gases and helps one to understand the difference between the two. 

Click for the chart.