Which statement is true of carbon monoxide?
A) It is a waste product of photosynthesis.
B) It is always present when organic material burns.
C) It is harmless.
D) It has a strong odor.
E) It is a greenhouse gas.

Question

Quizplus · Accepted Answer

Carbon monoxide is produced when organic material burns incompletely, and therefore it is always present in such situations, such as from car exhaust or faulty gas heaters.

Answer: E
 Carbon monoxide is not a greenhouse gas, but rather a dangerous air pollutant that can cause harm to humans and animals. It is a colorless, odorless gas that can be deadly in high concentrations.

Which Statement Is True of Carbon Monoxide