Emphysema Causes. Cigarette smoking is by far the most dangerous behavior that causes people to develop emphysema, and it is also the most preventable cause. Other risk factors include a deficiency of an enzyme called alpha-1-antitrypsin, air pollution, airway reactivity, heredity, male sex, and age. The importance of cigarette smoking as a risk factor for developing emphysema cannot be overemphasized. Cigarette smoke contributes to this disease process in two ways.
Northern Virginia map - Virginia county, city, map with roads. Arlington County, Alexandria City. Arlington and the city of Alexandria Virginia are close to Washington DC, inside the beltway.
North Park is a 3,075-acre (12 km 2) county park in Allegheny County, Pennsylvania, United States. It is the largest in the county's 12,000 acre (49 kmÂ²) network of nine distinct parks. Completed in 1931, North Park is sited 15 miles (24 km) northeast of downtown Pittsburgh in Hampton, McCandless, and Pine Townships.