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Colorado urges people to avoid driving due to dangerous ground-level ozoneJune 26, 2025 -
More than one-third of Americans routinely breathe in unhealthy airApril 25, 2024 -
Bay Area under first Spare the Air Alert of October just two days into monthOctober 2, 2021 -
Bay Area under first Spare the Air Alert of October just two days into monthOctober 2, 2021
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Hole in the ozone surpasses the size of AntarcticaSeptember 16, 2021