An official website of the United States government.

Due to a lapse in appropriations, EPA websites will not be regularly updated. In the event of an environmental emergency imminently threatening the safety of human life or where necessary to protect certain property, the EPA website will be updated with appropriate information. Please note that all information on the EPA website may not be up to date, and transactions and inquiries submitted to the EPA website may not be processed or responded to until appropriations are enacted.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

10-Year Study Links Faster Progression of Atherosclerosis to Air Pollution

The Multi-Ethnic Study of Atherosclerosis Air Pollution Study (MESA Air) was the first U.S. research study to examine a group of people over a period of 10 years and measure directly how long-term exposure to air pollution contributes to the development of heart disease and can lead to heart attacks, abnormal heart rhythms, heart failure and death.

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.