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blue20ae

Rank: 3Rank: 3
21# 跳轉到 »
發表於 2009-7-18 16:17 | 只看該作者
cure oil is a non-renewal resource.  The more we use -> the less on earth -> higher prices.

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tiffiant

Rank: 8Rank: 8
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發表於 2009-7-18 16:37 | 只看該作者
well, one day we won't have any gas

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