OKLAHOMA CITY (AP) - Gov. Mary Fallin has signed a bill into law that requires state agencies and colleges to save at least 20 percent in energy costs by 2020.

The bill was one of 31 measures Fallin signed into law on Tuesday, including an anti-abortion bill that paves the way for lawsuits against abortion providers and another that restricts the sale of a key ingredient used to make methamphetamine.

Fallin held a bill signing ceremony for the energy savings measure, which House researches project could save the state as much as $500 million over the next eight years.

Another bill further restricts the sale of pseudoephedrine, a common ingredient in cold and allergy medicines that is also used to manufacture meth. The bill links Oklahoma to a national pseudoephedrine tracking system.