Anyone whose blood pressure is 140/90mmhg or more for a sustained period is said to have high blood pressure or hypertension. A study shows that long-term exposure to both air and noise pollution can make the hypertension of a person high.

According to Science Daily, the largest study investigates the effects of both air pollution and traffic noise by following over 41,000 people in five different countries for five to nine years. The result is if a person has a long-term exposure to air and traffic noise pollution, that person linked to a greater incidence of high blood pressure.

A study published on October 25 in the European Heart Journal said that among adults, up to one extra person per 100 people of the same age group living in an area with air and traffic noise pollution would develop high blood pressure compared to those living in the less polluted areas.

As for exposure to chronic traffic noise, researchers found that people living in noisy streets, where there were average night time noise levels of 50 decibels, had a six per cent increased the risk of developing high blood pressure compared to those living on quieter streets where average noise levels were 40 decibels during the night.