Myth: Ozone quality is determined solely by human activity.

Myth:  Ozone quality is detrmined solely by human activity.

Fact:  According to the EPA: “Variations in weather conditions play an important role in determining ozone levels. Ozone is more readily formed on warm, sunny days when the air is stagnant. Conversely, ozone production is more limited when it is cloudy, cool, rainy, and windy.”

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