Stock image of a car exhaust emitting fumes. Drivers in Colorado have been asked to avoid using their cars amid poor air quality. Stock image of a car exhaust emitting fumes. Drivers in Colorado ...

Monday's warning, which asks motorists to refrain ... ozone include people with asthma." Colorado drivers have been asked to avoid using their cars in a bid to improve air quality.

Colorado drivers have been asked to leave their cars at home when they head out ... Drivers were asked to avoid using their gas and diesel vehicles to help manage pollution and "lessen the ...