don't worry about it these people don't know what they are talking about. You are not gonna be smoking enough to deprive your grow room of oxygen.....Clearly the people answering these questions are noobs as well. Don't listen to the above posts, enjoy the fruits of your labor while checking on the new generation.
Who the fuck are you calling me a "noob"? Don't be an asshole.
P.S. :
Plants can be affected in both a positive and negative manner by smoke.
Smoke, produced by combustion of some material, means that there is increased carbon dioxide over a limited area. This is good for the plants and can increase their growth if there is sufficient light.
The smoke particles that we see, however, are particulate pollution which can coat the leaf surface, reducing photosynthesis. These particulates can also clog stomatal pores, reducing gas exchange in the leaf. These effects are bad for plants. Cigarette smoke, and some other smokes, also contain tar which can clog stomatal pores.
Particulate pollution in smoke can be harmful to humans as well. Plants can be used to cleanse the air. As we all learn in school, plants need carbon dioxide (which we exhale when we breath) and produce oxygen (which we need). That's good. Plants can also cleanse particulate and chemical pollutants from the air, protecting our health. Plants with fuzzy leaves are most efficient at cleansing particulates from the air.
Suck a dick.
As for you mate..form you're own opinion on the info I just posted. And before anyone calls my "info" bullshit...I pulled it from the New Mexico State University website. Directlink:
http://cahe.nmsu.edu/ces/yard/2001/020301.html