Is Seawater a Last Resort to Cooling Japan’s Nuclear Reactors?

As the situation at Japan’s 40-year-old Fukushima Daiichi nuclear plant goes from bad to worse–four of the plant’s six boiling water reactors have been damaged by explosions or fire and radiation has begun leaking into the atmosphere–officials there continue to pump the reactors with seawater in an attempt to cool down fuel rods and avoid a complete meltdown that could release radioactive fallout across much of country.

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Is Seawater a Last Resort to Cooling Japan’s Nuclear Reactors?