Avoid smoking indoors. The number one way to combat indoor air pollution is to never let anyone smoke in your home.  Cigarettes are full of toxic chemicals, and secondhand smoke exposure can cause cancer.

Grow plants indoors. Live plants around your home act as natural air filters.  Some plants are effective absorbers of harmful pollutants emitted from carpets, furniture, and electronic equipment.  Clean your indoor air by filling your home with spider plants, Boston ferns, rubber plants, and palm trees.

Install a carbon monoxide detector. Carbon monoxide is an odorless gas and exposure to it can be deadly.  To prevent carbon monoxide poisoning, buy a detector at your local hardware store.

Check for radon. Radon is a radioactive gas that is naturally present in soil and it can enter your home through cracks in your foundation.  Radon is also the second leading cause of lung cancer in the United States.  Radon test kits are sold at hardware stores.