Air pollution is linked to an increased risk of developing an irregular heartbeat—a risk factor for stroke—and blood clots in the lung, finds a large study published online in the journal Heart. But its impact on directly boosting the risk of heart attacks and stroke is rather less clear, the research indicates. The evidence suggests that high levels of certain air pollutants are associated with a higher risk of cardiovascular problems, but exactly how this association works has not been clarified.
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