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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Putting a price on carbon dioxide, as the cap-and-trade bill that passed the House in June would do, would make coal more expensive to burn and gas relatively cheaper.

因为考虑到释放二氧化碳的代价，并且众议院在六月份通过了排污交易法案(总量管制和交易法案)，以煤为燃料将会比较昂贵，而燃烧天然气会比较便宜。

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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.

第一个要求很容易就得到了满足：众议院和参议院的领导们指示他们的部下将发电机换成使用天然气的，这比用煤要清洁许多。

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This week, a group marched on Mayor Ray Nagin's house, dropping coal on his porch, just a few blocks from the bulldozers.

NPR: New Orleans to Bulldoze Public Housing

Three families will be selected to appear in the Coal House series, which will send people back in time to taste life in a 1927 south Wales mining town.

BBC: The men had to carry coal sacks during one task

She remembered that when she was a little girl she believed that three ghosts were living in the coal house, and one of the ghosts wore a silver ring.

NPR: Excerpt: 'The Member of the Wedding'