How can I stop being a passive smoker?
Only one answer to this, don’t go near people who smoke. Ask your supervisor at work, or manager, they need to be aware of the problem, you have rights, you have rights not to work where people are smoking, I sure this should apply to people who, like you have to go into other peoples properties who smoke. If all else fails, get a note from you doctor to your employer, telling them that passive smoking is not good for your health. My dad was in a job, where people he work with smoke, a note from his doctor to his company, sorted out the problem. Good luck in your quest.