Scientific evidence on the toxicity of secondhand commercial tobacco smoke is both overwhelming and indisputable. In 2006, the U.S. Surgeon General concluded there is no risk-free level of secondhand smoke, and that smoke-free laws and policies are the most effective way to protect individuals from exposure. Our resources focus on policy solutions for a number of different environments, from schools, to casinos, to outdoor spaces. If you are looking for information on housing specifically, visit our Smoke-free Housing page.