The latest round of ads in Minnesota's anti-tobacco campaign take a new approach to smoking cessation: they target people who don't smoke. The state-wide television advertising campaign hopes to convince non-smokers to take action to ensure the air around them is clean. Studies show secondhand smoke can cause health problems ranging from mild asthma to lung cancer. Dr. Stuart Hanson is a pulmonologist and the Vice Chair of the Minnesota Partnership for Action Against Tobacco. He says there are lots of things non-smokers can do to clear the air around them.