These six states have the highest electric-car adoption rates in the country

2018 Nissan LeafBy now, many people would likely produce the correct answer when asked, Where in the U.S. are electric cars most popular? That would be California, which last year had almost seven battery-electric and plug-in hybrid cars registered per 1,000 people. But five other states have more than two plug-in vehicles per 1,000 residents—and we're...