Science textbooks approved for California public schools would have to cover climate change, and science teachers would be required to put warming in their curricula, under a bill approved by the state Senate and heading to the Assembly. Says state Sen. Joe Simitian (D-Palo Alto), who introduced the bill, “This is a phenomenon of global importance and our kids ought to understand the science behind that phenomenon.” Critics of the bill had the usual concerns: children shouldn’t be indoctrinated with environmental propaganda, climate science is uncertain, the skeptic voice wouldn’t get fair time, blah blah blah.