There was a time when I could catch a whiff of cigarette smoke and it hardly bothered me. Now I can feel my airways start to constrict when I smell it; that and diesel fumes when we're on the road. Once we were in Florida and paid to go into a National park that had natural springs. Some people were there, smoking like chimneys and we had to leave because the smoke would just hang in the air. Thankfully the parks here in PA have rules about no smoking!