Original Source: BBC News

"Exposure to small particulates - tiny chemicals caused by burning fossil fuels - is known to increase the chances of heart disease and stroke. But the Harvard School of Public Health found it also affected development of deep vein thrombosis - blood clots in the legs - in a study of 2,000 people.

Researchers said the pollution made the blood more sticky and likely to clot. The team looked at people living in Italy - nearly 900 of whom developed DVT. Blood clots which form in the legs can travel to the lungs, where they can become lodged, triggering a potentially fatal pulmonary embolism."

Images courtesy of eNews 2.0 and Ontario Now