Mixing units when not appropriate.<p>Heating is a great example, solar hot water heaters or sunroofs can cheaply collect a lot of heat.  Heat pumps can also extract energy from air pushing up there numbers.*  Further, insulation can make a large difference without directly showing up on heating or cooling numbers.  All of which make the &quot;Heating, cooling 37 kWh&#x2F;d&quot; a meaningless number.<p>Transportation is another area, we don&#x27;t care about the energy content of gas when IC engines have such terrible efficiency numbers.<p>&quot;not on my street&quot;, &quot;not in my back yard!&quot; page 109 are also complexly arbitrary issues.  Consider, farmers love wind power as a very small footprint brings significant revenue.  Sheep can happy eat grass under a wind turbine.<p>(*): A solar room can collect heat which is then redistributed though a home or even concentrated by a heat pump at extreme efficiency to heat a house without being uncomfortably warm or ugly.