Air Pollution is Everywhere

A search of “air pollution” on any major news website is bound to bring up recent articles about air pollution around the world.  I did this search on the New York Times website, and the first article to appear was “Protests in Iranian City Where ‘Everything Is Covered in Brown Dust’”.  The article talked about a city in Iran, Ahvaz, where the air quality is so bad that citizens are taking to the streets to protest the government, going so far as calling for the resignation of the local governor. Two articles later was about London’s air quality issues since diesel vehicles and wood-burning fires in private homes have become more popular. The quality of air is so bad, that it is being compared to the Great Smog that occurred in December 1952, with an estimated death toll of 12,000 people.

 December 1952: London during the day during the Great Smog event (Soruce: )

December 1952: London during the day during the Great Smog event (Soruce:

Luckily, the frequency of these extreme events is falling, at least in the United States.  The Environmental Protection Agency (EPA) has been tracking major air pollutants since 1980, and the trend of almost all the pollutants the EPA tracks is that they are present in declining amounts.  One reason that the U.S. has less extreme air pollution events is that there is  legislation in place that helps to limit the amount of pollutants that are getting into the air.  An overview of federal regualtions can be found at


Unfortunately, the rest of the world has not had this same fortune.  A number of  cities, many in China and India, have become known for their low quality air, where people wear masks to avoid breathing in the air directly.  In May 2016, The World Health Organization (WHO) said that more than 80% of the world's population that live in urban areas are exposed to air quality levels that exceed WHO standards, by 5-10 times in some countries. Most of these people live in low- or middle-income countries, and are at increased risk for stroke, heart disease, lung cancer, and chronic and acute respiratory diseases, including asthma, due to regularly breathing low quality air.  Luckily, there is some good news.  In the past two years, the number of cities monitoring their air quality has doubled, and more cities are following the trend. Knowledge is power, and when cities take steps to monitor their levels, they may be able to reduce some types of pollution, and citizens benefit in the form of lessened disease risk and improved air quality.






Hannah Leis



Hannah Leis

Hannah Leis is a senior at Tulane University and will be graduating in May 2017 with a double major in Economics and Environmental Studies. During Fall 2015, Ms. Leis studied Sustainable Development in Copenhagen, Denmark.  While in the program, she developed a passion for sustainability based on the unique Copenhagen model.  Ms. Leis has held a number of environmentally-focused internships and jobs throughout the New Orleans area.  Ms. Leis has extensive experience working with Stata, disentangling federal environmental regulations, and researching various environmental issues. Ms. Leis is excited to launch her career in the environmental or sustainable development fields.  Her hobbies include SCUBA diving and exploring her adopted home of New Orleans.