Live near a major road? You may be shortening your lifespan. In a major Danish study of over 50,000 people, those aged 65+ suffered a higher chance of stroke if they lived near traffic. Every 10 decibels of noise increased the risk by 27%, and that rate increased even higher over 60 decibels. The researchers attribute as many as 19% of stroke cases to this problem. The lesson: Now that you've retired, stop parking out by the airport to get stoned and watch the planes come in overhead. Get stoned in the forest instead.