Republic: The Sierra Club has filed a 57-page critique of a plan to upgrade a natural-gas fired power plant in Tempe with county air-quality regulators. Arizona Public Service Co. plans to upgrade the Ocotillo Power Plant near Tempe Marketplace by replacing some of the old generators on the site with newer, faster-starting generators. The Sierra Club said in its comments to the Maricopa County Air Quality Department that APS should consider adding battery storage for electricity, rather than the polluting...