DENVER (AP) – Health officials warn of potentially unhealthy air pollution along Colorado's Front Range this weekend due to the high ozone levels.
The Department of Health and Social Affairs in Colorado has issued an alert for ozone, which should last for at least 4 hours. Sunday.
The agency says active children and adults and people with lung diseases, such as asthma, should reduce long-term or heavy efforts in the open air.
The affected area includes the southern and western parts of the Denver area, north to Boulder and Fort Collins.
Affected ozone is created when the vehicle's exhaust gases, dyes, cleaning agents and other chemicals react with sunlight. It usually worsens during the summer and can cause severe breathing problems and causes asthma attacks.