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Northwestern researchers have discovered that this microscopic air pollution – smaller than 10 microns or less than one-tenth of the diameter of a human hair -- spurs hyperclotting of the blood. The study found that lungs inflamed by the pollution secrete a substance, interleukin-6, which causes an increased tendency for blood to coagulate or clot. This raises the risk of a fatal heart attack or stroke in people with cardiovascular disease such as coronary artery disease, congestive heart failure or a history of stroke.
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The risk of dying from a heart attack or ischemic stroke jumps a whopping 30 percent with each additional 10 micrograms of pollution.
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