‘…It would cost $73 trillion to revamp power grids, transportation, manufacturing and other systems to run on wind, solar and hydro power, including enough storage capacity to keep the lights on overnight, Mark Jacobson said in a study published Friday in the journal One Earth. But that would be offset by annual savings of almost $11 trillion, the report found.’
Going 100% Green Will Pay For Itself in Seven Years, Study Finds | Bloomberg