From WebMD:
Quote:
More evidence reveals that short- and long-term exposure to air pollution directly increases the likelihood of heart attack, heart failure, irregular heartbeats, and death, particularly among vulnerable populations, such as those already at high risk for cardiovascular disease, the elderly, and possibly people with diabetes.
Long-term exposure to high concentrations of particulate matter further increases cardiovascular disease risk and can shorten life expectancy by several months to a few years.
Air Pollution Increases Heart Attack, Stroke Risk