Walmart announced Thursday plans to add electric vehicle (EV) chargers to thousands of U.S. stores in a sign of mainstreaming zero-emission cars. The U.S. retail giant, which has electric car chargers in a fraction of its U.S. stores, plans to “build our own electric car fast-charging network at thousands of Walmart and Sam’s Club locations coast to coast,” a Walmart press release said. that about 90 percent of the US population lives within 10 miles of a Walmart. The announcement is the latest sign of movement in the U.S. transportation…