The ability to deal with extreme heat can mean the difference between victory and defeat.

CNN: Silver secret behind golden hopes

These pens would bob 60 feet below the surface, kept in place with motors powered by heat exchangers that use the temperature difference between deep water and shallow water to generate electricity.

FORBES: Magazine Article

The difference is that energy normally lost through heat in the latter two scenarios is now recovered.

FORBES: Gravity May Soon Qualify As Renewable-Energy Resource in New York

The difference is merely whether the same quantity of waste heat energy is thrown away at the source or in the vehicle.

FORBES: The Heretic: Electric Cars Should Be Called Coal Cars

The copper plates conducted heat rapidly to and from the bismuth telluride, thus maintaining the temperature difference.

ECONOMIST: Solar power