I had a neighbor that did all that because he was always feeling under the weather.
Macrobiotic diet too. And an EKG.
Turned out that another group at work was dumping acid down the cyanide drain, and naturally,
the drain was vented on the roof next to the air-conditioning intake for his area.
He only smelled it after from coming back from a long lunch one day. Giving up smoking probably
helped his sense of smell.
Feces on your greens is probably better in the long run than smoking. But either one is okay with me, just as long as you don't do it in my face!