Kansas City’s recent approval of a tough smoke-free law for restaurants and bars already is having positive effects across the metropolitan area.

Unified Government Mayor Joe Reardon plans to introduce a similar ordinance affecting public places in Wyandotte County.

With passage in that county, smoke-free laws soon could be in place in the area’s six largest cities: Kansas City, Overland Park, Olathe, Independence, Lee’s Summit and Kansas City, Kan.

That would go a long way toward creating a level playing field for restaurants and bars that compete against each other.

Other cities also reportedly ready to consider smoke-free laws include Raytown, North Kansas City and Raymore. Raytown unfortunately remains one of the largest area cities that doesn’t protect customers and employees of eating and drinking establishments from smoking’s harmful effects.

The decision by Kansas City voters on April 8 also came at a key time for Lee’s Summit residents.

Just weeks ago, some City Council members were discussing a plan to allow customers to light up in some bars in Lee’s Summit.

That would have been an unneeded change in the voter-approved initiative of 2006. A few other council members spoke out against the change, as did a number of other citizens.

With passage of Kansas City’s new law, the promoters of changing the Lee’s Summit law backed off. That was a responsible move.

Other government leaders who have sat on the sidelines for too long need to start helping clear the air throughout the region.