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A live map from AirNow showed that, as of 10:42 a.m. ET, air quality considered unhealthy for sensitive groups was detected in parts of California, Oregon, and Idaho, while "unhealthy" air was ...

(Reuters) - Air quality in wildfire-stricken Los Angeles improved on Thursday from hazardous peaks hit earlier this month, as tiny soot particles that can penetrate the lungs and brain dropped to ...

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