Pollution from back-to-school traffic could cause a spike in ozone. With school back in session the Valley Air District is asking the public to reduce vehicle emissions by carpooling or walking their children to school and to refrain from vehicle idling during school pick-ups and drop-offs. Triple-digit temperatures and multiple wildfires may also impact Valley air quality, and the public’s help is crucial in reducing the risk of spikes in ground-level ozone and exceeding federal air quality standards.