LAKEWOOD — Electronic cigarettes and vaporizers, which have experienced an explosive growth in popularity in the last few years, are beginning to face stiff resistance in Colorado as an increasing number of communities crack down on the battery-powered devices.

Last week, both Lakewood and Fort Collins applied their public-smoking restrictions to electronic smoking devices, banning their use wherever cigarettes are prohibited.

Louisville, Golden, Commerce City and Durango are in various stages of doing the same.

Much of the concern about the tobacco-free devices, which use a heating element to vaporize a nicotine-laced liquid solution known as e-juice, stems from the fact that they are relatively new, largely unregulated and the subject of conflicting health claims.

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