Energy Storage: From Gasoline to Ultracapacitors

Energy cannot be created or destroyed.  Scientists have accepted this theory of conservation of energy for ages[1].  But this theory seems to be in juxtaposition with the conventional thought of energy being a scarce resource.  If energy cannot be created or destroyed, why are we always scrambling to find new sources of energy?  While energy cannot be created or destroyed, it can change form.  And there are only certain forms of energy that we can practically harness for use.  One of those forms is potential energy[2].  How we work with potential energy, transport it and harness its potential, is an area of significant evolution in science.

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