Can you imagine a house powered not by sun, wind or coal, but by living algae?
你能想象一座房子不是由太阳能、风能或者煤而是由活的藻类供应能量吗？
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The first demand was easily met: the leaders of the House of Representatives and the Senate instructed their staff to convert the plant to run on natural gas, which burns more cleanly than coal.