Washington Post: Van Jones may have one of the hottest assignments in the Obama administration — selling the notion of a new “green-collar” economy — but in a country burdened with a 9.4 percent unemployment rate, it’s not easy. How do you tell an unemployed construction worker that it’s time to start thinking about installing solar panels instead of aluminum siding? “I think some of these ideas are complicated for people when they first hear them,” said Jones, senior green jobs adviser to the White …