“Surgeon General Richard H. Carmona declared today that the evidence is now ‘indisputable’ that secondhand smoke is an ‘alarming’ public health hazard, causing tens of thousands of premature deaths from heart disease and cancer among nonsmokers each year.”

Surgeon General Warns of Secondhand Smoke

“There is no safe level of secondhand smoke, and even brief exposure can cause harm, especially for people already suffering from heart or respiratory diseases.”

(Thanks to Brad for the link.)