The annual air pollution rankings, being released Wednesday by the American Lung Assn., were dominated by the Los Angeles Basin and California's Central Valley, which despite vast improvements over the last few decades still have the nation's highest levels of ozone and fine particle pollution. Even as population grows, emissions of the most widespread air pollutants continue to drop. Greater Los Angeles has reduced ozone levels by more than one-third in the last 15 years, the Lung Assn. says, while fine particle pollution has dropped by half over the same period. Still, over 147 million people — about 47% of the nation — live in counties with unhealthy air, according to the report Written by. In 2010, some 223,000 people around the world died from lung cancer caused by exposure to air pollution, the World Health Organization (WHO) said yesterday. And more than half of those deaths are believed to have been in China and elsewhere in East Asia.  Defra has a 10-point scale for measuring air quality-with level one implying a low risk of air pollution and 10 warning of very high levels. Levels are determined by the concentration of five pollutants in the air, including NO2, sulphur dioxide (SO2) and ozone. But in the UK it is combining with high levels of local air pollution to irritate people's lungs. People with heart disease or lung disease or the elderly should take the health warnings seriously. The annual air pollution rankings, being released Wednesday by the American Lung Assn., were dominated by the Los Angeles Basin and California's... Los Angeles has again topped a list of the cities with the worst smog in the nation, violating federal health standards for ozone an average of 122 days a year. Even as population grows, emissions of the most widespread air pollutants continue to drop. Greater Los Angeles has reduced ozone levels by more than one-third in the last 15 years, the Lung Assn. says, while fine particle pollution has dropped by half over the same period. Still, over 147 million people — about 47% of the nation — live in counties with unhealthy air, according to the report 11 U.S. Cities With the Worst Air Pollution. The good news: Air has gotten cleaner in recent years. Now the bad: More than half of people in the U.S. still breathe air dirty enough to cause health problems, according to the American Lung Association.  Los Angeles again tops the list of cities that have the worst ozone pollution in the U.S., according to a new report released Wednesday. Share This Story. The city has topped the dirty air list in 14 of the 15 annual State of the Air reports released so far. Several cities have reduced air pollution levels. Los Angeles, for example, reduced over one-third of unhealthy ozone days in the past 15 years. Pittsburg too has lowered its particle China has made some improvements in environmental protection during recent years. According to the World Bank, 'China is one of a few countries in the world that have been rapidly increasing their forest cover. It is managing to reduce air and water pollution.  Ever since the beginning of the Industrial Revolution in the United States, America has had much trouble with environmental issues, air pollution in particular. According to a 2009 report, around 60 percent of Americans live in areas where air pollution has reached unhealthy levels that can make people sick. In the United States unhealthy levels of pollution are measured by the Environmental Protection Agency and independent researchers or agencies, like the American Lung Association. Federal limits and pollution standards are set by the Clean Air Act. Water Pollution and your Health. The quality of a stream or river is often a good indication of the way of life within a community through which is flows. It is an indicator of the socio-economic conditions and environmental awareness and attitude of its users. In South Africa the scarce fresh water is decreasing in quality because of an increase in pollution and the destruction of river catchments, caused by urbanisation, deforestation, damming of rivers, destruction of wetlands, industry, mining, agriculture, energy use, and accidental water pollution.
http://www.latimes.com/science/la-me-0430-air-pollution-20140430-story.html http://qz.com/136606/here-are-the-worlds-worst-cities-for-air-pollution-and-theyre-not-the-ones-youd-expect/ http://www.bbc.co.uk/news/uk-26844425 http://www.latimes.com/science/la-me-0430-air-pollution-20140430-story.html http://www.health.com/health/gallery/0,,20490855,00.html http://www.natureworldnews.com/articles/6817/20140430/los-angeles-worst-ozone-pollution-report-finds.htm https://en.wikipedia.org/wiki/Pollution_in_China https://en.wikipedia.org/wiki/Air_pollution_in_the_United_States http://www.randwater.co.za/CorporateResponsibility/WWE/Pages/WaterPollution.aspx
why does johannesburg have the highest pollution levels