Voters also decided on 160 ballot initiatives nationwide. Two of the most closely watched measures were in California. Voters there defeated Prop 19, which would have legalized recreational marijuana use. In a rebuke of major oil companies, voters rejected Prop 23, a measure that would have suspended implementation of the state’s 2006 groundbreaking clean air legislation that requires greenhouse gas emissions to be reduced to 1990 levels by 2020. South Dakota also rejected a measure to legalize medical marijuana. Meanwhile, Oklahoma voters approved measures to ban the use of international law in state courts and allow opt-outs from President Obama’s healthcare reform bill.