Question

which of the following is one of the four most dangerous indoor air pollutants as identified by the environmental protection agency? pet odors oxygen cooking smells radioactive radon gas

Explanation:

The Environmental Protection Agency (EPA) has identified radioactive radon gas as one of the four most dangerous indoor air pollutants. Radon is a radioactive gas that can seep into homes from the ground. It is odorless, colorless, and tasteless, making it difficult to detect without proper testing. Prolonged exposure to high levels of radon can increase the risk of lung cancer. Pet odors and cooking smells are generally nuisances but not classified as among the most dangerous pollutants by the EPA. Oxygen is a necessary gas for life and not a pollutant.

Answer:

radioactive radon gas