According to the latest data, 148 million Americans live in regions with a high degree of air pollution. This is 50% of the total population of America. Data were able to establish in the framework of the research status of air over the entire territory of the United States. The analysis took two years.
The dirty air specialists registered in the state of California. There were recorded the highest pollution level ozone and particulate matter. Worse things in the state are in Los Angeles, this town is not the first time falls in the list of places with poor ecology.
In addition to Los Angeles in the list includes Philadelphia, Las Vegas, Houston, new York, Phoenix, Washington-Baltimore and Chicago. The main causes of pollution - climate and the neglect of natural resources, a huge number of industrial enterprises and transport in large Metropolitan areas.