California Code, Government Code - GOV § 12612

(a) In any administrative, licensing, or other such proceeding or in any proceeding for judicial review thereof which is made available by law, the Attorney General shall be permitted to intervene upon showing that the proceeding or action for judicial review involves conduct, programs, or products which may have the effect of impairing, polluting, or destroying the natural resources of the state.

(b) In any proceeding described in subdivision (a), in which the Attorney General is a party, the agency or court shall consider the alleged impairment, pollution, or destruction of the natural resources of the state, and no conduct, program, or product shall be authorized or approved which does, or will have such effect unless it is consistent with the protection of the public health, safety, or welfare.

(c) In any judicial review under this section, the evidence before the court shall consist of the record before the agency and any other relevant evidence which, in the judgment of the court, should be considered to effectuate and implement the policies of this article.