If speed kills, then the logical conclusion would be that police pulling over speeders are saving lives. Whether you accept that premise or not, however, one patrolman in Maine actually did save a man's life when he stopped him for breaking the speed limit.
In what might be considered one of the worst bits of info related to diesel engines, medical researchers at the University of Edinburgh say that chemical particles (aka particulates) exiting the tailpipe of diesel-fueled vehicles can significantly increase the risk of heart attack in otherwise healthy adults.
Tiny chemical particles emitted by diesel fumes could raise the risk of heart attacks, research has shown. Scientists have found that ultrafine particles produced when diesel burns are harmful to blood vessels and can increase the chances of blood clots forming in arteries, leading to a heart attack or stroke.