5 fossil fuel supply the impacts on suppliers of policies to limit carbon emissions will depend how much is in each type more severe impact if kyoto protocol emis sions reduction targets were imposed us coal and oil industries would see lower consumption pro duction than reference case which does not incor porate whereas natural gas industry expand wins out over cases used for this analysis because its content per british thermal unit btu only 55 percent that 70 as a result higher from are projected be while clean economical widely available 58 million homes 60 manufacturing plants united states almost one quarter energy consumed
