Health or productivity?

Sign outside LEED project, Renfrew Street, Vancouver, British Columbia

These days there are not many arguments about the wisdom of smoking. There general consensus is that it is smelly, expensive, and harms your health. But what does that have to do with a building built to LEED standards? Not a huge amount, but eliminating smoking on sight probably has a beneficial effect on productivity. No one is nipping off for a smoke break.

Or will the opposite happen? Will the smokers be heading off site for a smoke while still on the clock? So, will this improve productivity, or have the opposite effect?