State letter criticizing Southern California smog rule

A let­ter from the Cali­for­nia Air Re­sources Board raises “ser­i­ous con­cerns” with South­ern Cali­for­nia air qual­ity reg­u­lat­ors’ vote to ad­opt an in­dustry-backed smog reg­u­la­tions.

Sources: California Air Resources Board