An air quality alert was issued on Monday at 8:08 p.m. in effect until Wednesday at 7 p.m. The alert is for Joshua Tree, ...

Smoke, ash and all the toxic chemicals that come ... has been sitting at “unhealthy” levels for many parts of Southern California for several days. Toxicological and epidemiological studies ...

To reach their conclusion, the researchers analyzed genomic variation from more than 1,000 individual trees from 61 separate populations around the Oregon ash range, extending from California ...