University Of California San Francisco Medical Center

8 References Houston has excessive ozone levels and is routinely ranked among the most ozone-polluted cities in the United States. Ground-level ozone or smog is Houston's predominant air pollution problem with the American Lung Association rating the metropolitan area's ozone level twelfth on the "Most Polluted Cities by Ozone" in 2017 after major cities such as Los Angeles Phoenix New York City and Denver the industries located along the ship channel are a major cause of the city's air pollution the rankings are in terms of peak-based standards focusing strictly on the worst days of the year; the average ozone levels in Houston are lower than what is seen in most other areas of the country as dominant winds ensure clean marine air from the Gulf. .

Dallas On 3 September 1943 the Western Allies invaded the Italian mainland following Italy's armistice with the Allies. Germany with the help of fascists responded by disarming Italian forces that were in many places without superior orders seizing military control of Italian areas and creating a series of defensive lines. German special forces then rescued Mussolini who then soon established a new client state in German-occupied Italy named the Italian Social Republic causing an Italian civil war the Western Allies fought through several lines until reaching the main German defensive line in mid-November. !