Doctors have long known that obesity increases the risk for developing asthma, but new research suggests the opposite also may be true.
More than 100 wildfires are blazing through parts of the western United States, including one in California that has grown to become the largest fire in the state's history.
Fresh air is in short supply at U.S. national parks, a new study shows.
More than 4 in 10 women with asthma developed chronic obstructive pulmonary disease (COPD), and heavy smoking and obesity were among the significant risk factors, a new study found.
