After recently enacting laws requiring 100 percent carbon-free power, Midwest blue states are eyeing tailpipe emissions. In Minnesota, a state-appointed working group last week issued a report with recommendations for a clean transportation standard, requiring reductions in the carbon intensity of vehicle fuels over the next two decades. Bills to establish similar standards are also on file in states including Michigan. And there’s legislation in Illinois for the state to become the first in the Midwest to adopt California’s Advanced Clean Cars II rule – a policy that would eliminate the sale of new gasoline-powered cars in 2035.