It's easy to see why: nuclear fusion powers the sun, and it holds out the possibility of near-limitless electricity, without pollution.

很容易知道原因：核聚变为太阳提供能量，也为一种近乎无限的无污染的电提供了可能。

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And it does not use hot fusion, the union of hydrogen atoms into larger elements that powers the sun and stars.

FORBES: NASA: A Nuclear Reactor To Replace Your Water Heater