West of Australia's Great Dividing Range, a cluster of giant black gashes marks one of the country's biggest coal mines.

澳大利亚大分水岭的西面，有很多巨大的黑色深沟，这里是该国最大的煤炭产地。

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But once the gas is out of the ground, it is a great deal cleaner than coal.

但是，一旦天然气被开采出地面，这将比煤炭清洁许多。

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China has done a great deal in the past few decades to raise its output of coal and petroleum.

在过去几十年里中国已大量提高了其输出的煤和石油的量。

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Many Cleveland-Cliffs investors were unhappy that their iron ore play was getting a great deal of coal exposure.

FORBES: Cleveland-Cliffs' Buyout Tiff

But once the gas is out of the ground, it is a great deal cleaner than coal.

ECONOMIST: Natural gas

Plenty of power as long as the Fireman was feeding coal into the Firebox at a great rate.

BBC: Beer, steam, speed - and money