SACRAMENTO, Calif. (AP) - California Gov. Jerry Brown has signed a bill imposing the nation's first statewide ban on single-use plastic bags as a way to address litter. The legislation will prohibit large grocery stores from carrying single-use bags starting in July 2015, expanding to smaller stores the year after. It also allows businesses to charge 10-cent fees for customers using paper bags. More than 100 cities and counties, including San Francisco and Los Angeles, have their own plastic bag bans. Brown said during a gubernatorial debate earlier this month that he would sign SB270 because of the patchwork of local regulations regarding plastic bags.