A Missouri group pushing for smoke free restaurants says they have the numbers to prove going smoke free makes communities healthier.
Nineteen cities around the state were tested in 2011 - half of those cities enacted smoke free ordinances.
Follow up testing shows pollutants dropped 88%, improving the air quality.
There are no ordinances requiring smoke free restaurants in Joplin.
We spoke with one restaurant owner who says he's aware of the dangers of secondhand smoke and does what he can to help prevent it.
"They are called Smoke Eaters," says Dan Witworth, the owner of Sportsman's Park. "It's an electrostatic charge and as the air goes through it it hits that charge and drops out a lot of the smoke particles, and they do work but they have a tendency at times to be overwhelmed."