I've always been of the view that oil and coal were too valuable, too energy-dense a finite resource, to waste, but should be kept in reserve for if/when we rea

I've always been of the view that oil and coal were too valuable, too energy-dense a finite resource, to waste, but should be kept in reserve for if/when we really need that kind of energy density. On a local scale: I'd rather use solar on my rooftop, but don't mind having a diesel generator when the power goes out. Other uses for oil and coal besides. Coking coal for steel production, oil for plastics, etc.