Chronic obstructive pulmonary disease, commonly called "smoker's cough," is killing more and more nonsmokers and new studies show that indoor pollution is just as much to blame for the problem as outdoor pollution.

More than 2.5 million people die each year from COPD, about as many who die annually from AIDS. Allergies, tuberculosis and poor ventilation can cause the disease, the fifth-leading cause of death in high-income countries, according to a study published this week in the Lancet.

"COPD is much more common than previous estimates would suggest," said study author Dr. A. Sonia Buist, chief of the division of pulmonary and critical care medicine at Oregon Health & Science University. "We did the study, because there is a hugh disconnect between the public and the public health perception of the burden of COPD, and the reality."

Please click here to read the whole Foxnews story.