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More than twenty US states ban smoking in public places. And many countries around the world also have similar bans. A new study shows the strongest evidence yet that smoke-free laws can reduce heart disease, which is a major effect of tobacco smoke.
The study took place in Pueblo, Colorado. In July 2003, Pueblo banned smoking in public places and workplaces. In the 18 months before the ban, hospitals admitted 399 people for heart attacks. In a period starting 18 months after ...
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