Eventually it gets too loud, so gamers replace fans with a water-cooling system--essentially a car radiator for their computer--which also enhances overall performance.

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If the pumps are knocked out in a Generation II reactor as they were at Fukushima Daiichi by the tsunami the water in the cooling system can overheat and evaporate.

WSJ: William Tucker: Japan Does Not Face Another Chernobyl

The system cooling water which contained spent - but still highly radioactive - nuclear fuel rods failed and it took engineers some 30 hours to repair the damage.

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The new Generation III reactors such as the AP1000 have a simplified "passive" cooling system where the water circulates by natural convection with no pumping required.

WSJ: William Tucker: Japan Does Not Face Another Chernobyl

The opportunities for sustainable energy strategies are everywhere, beginning with the design of buildings, to construction processes, to insulation, the HVAC system, the lights, the water, the elevators, the power and cooling for technology, the heating and cooling for people.

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