Roanoke Times: The current calculation seems to yield disaster — fossil fuels plus national dependency equals big trouble. An oil spill leads to environmental catastrophe. Twenty-nine coal miners die in a West Virginia mine. Fly ash from a coal-fired power plant escapes a failed dike in Tennessee. Lynchburg-based Babcock & Wilcox has high hopes for an alternative that would involve a sort of Mini Cooper version of a nuclear reactor housed underground in a concrete bunker. As …