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Participants have already logged over 27,000 alternative vehicle miles. With almost every other day being a high ozone day this summer, your efforts make a difference!
Encouraging your coworkers and employees to leave their cars at home one or more days a week during the high ozone months of summer reduces ground-level ozone and greenhouse gas emissions. Participants can win prizes too!

• Grand prize: $500 gift card
• Runner-up prizes: $100 REI gift cards
• Prize eligibility just for participating
Log in to the challenge and make sure you log all of your trips for July and August!
Why does ozone matter?
Unlike the good, protective ozone layer in the stratosphere, ground-level ozone is a harmful air pollutant that affects all of us. It’s formed when emissions from everyday items combine with other pollutants and “cook” in the heat and sunlight. Sources of such emissions include local industry; gasoline-powered vehicles and lawn equipment; and household paints, stains, and solvents. Weather plays a key role in ozone formation. The highest ozone levels are usually recorded in summer months when temperatures approach the high 80s and 90s, and the wind is stagnant or light.
At ground level, ozone is a health hazard for everybody, especially the young and elderly. Those who are active and exercising outdoors may experience breathing difficulties and eye irritation. Prolonged exposure may result in reduced resistance to lung infections and colds. Ozone can also trigger attacks and symptoms in individuals with pre-existing conditions, such as asthma, or other respiratory diseases, like chronic bronchitis and COPD (Chronic Obstructive Pulmonary Disease).
Email ghoefler@bouldercounty.org if you have questions about the challenge.
Keep up the great work!
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