Car-sharing service on roll

CLEVELAND - Chris Trepal has become a firm believer in car sharing. ``It's wonderful,'' she says. ``It's easy to use. We haven't found a downside yet.... It's made a big change in our small office.'' Trepal is director of the Earth Day Coalition. She and her five fellow eco-group employees now rent CityWheels vehicles several times a week to get to meetings around the Cleveland area.