Why is carbon monoxide particularly dangerous to humans?

Carbon monoxide is particularly dangerous to humans because it is a colorless, odorless gas that can interfere with the body’s ability to transport oxygen. When inhaled, carbon monoxide binds to hemoglobin in red blood cells more effectively than oxygen does, forming carboxyhemoglobin. This reduces the amount of hemoglobin available to carry oxygen throughout the body, leading to symptoms of oxygen deprivation, such as headaches, dizziness, confusion, and in severe cases, can result in loss of consciousness or death.

The other options describe characteristics that may pose risks but do not accurately reflect the primary hazard associated with carbon monoxide exposure. Skin irritation is typically associated with direct chemical exposure rather than inhalation. While carbon monoxide is flammable, its primary danger to health comes from its toxic effects rather than its potential to cause explosions. Lastly, although carbon monoxide is involved in atmospheric reactions that can contribute to climate change, its immediate danger to human health is significantly greater due to its toxicity and effects on oxygen transport in the bloodstream.