All of this area’s largest cities have tough smoke-free laws, with the regrettable exception of Kansas City, Kan.

It’s time for Unified Government Mayor Joe Reardon and the commission to step forward and protect residents from harmful smoke.

A recent public opinion survey showed nearly two out of three residents of Kansas City, Kan., support a smoking ban. That’s a powerful mandate for action in Wyandotte County.

On Thursday, the Unified Government Board of Commissioners is expected to discuss several smoke-free options that would cover Kansas City, Kan., as well as Edwardsville and Bonner Springs.

The best approach would be to prohibit smoking in all public places, including restaurants and bars.

In addition, the law should ban smoking on the gambling floors of any casinos in the county when other area casinos take similar action. Kansas City voters endorsed that kind of language in an April election.

Unfortunately, Reardon has had qualms about passing a strict ordinance, saying he would not “put our Kansas City, Kan., businesses at an economic disadvantage.”

That argument is moot now that every other large local city has a strong no-smoking policy affecting bars and restaurants. In the recent opinion survey, 63 percent of Kansas City, Kansas, residents endorsed a smoke-free law. While 49.4 percent thought bars and private clubs should be exempted, city officials have a responsibility to protect the health of workers and customers in those businesses.

Kansas City, Overland Park, Olathe, Independence and Lee’s Summit all prohibit smoking in bars. So there’s no “economic disadvantage” for it to be banned in taverns in Wyandotte County.

With the proper leadership from elected officials, the county’s residents soon could join the rest of the region in breathing cleaner air.