Answer:
However, please note that not all ‘renewable’ resources are worth using. For example, the the energy expended converting corn sugar to alcohol (ethanol - for combustion) still exceeds the energy obtained from the ethanol.
Explanation:
People are gaga about the prospective future of “hydrogen’ based transportation fuels, but fail to note that liquid hydrogen has only 1/40 the energy density of gasoline. We’ll need some pretty big fuel tanks to use hydrogen in our cars!
