This shows that the Clean Air Act can be used to reduce these gases in a cost-effective way.

这表明，清洁空气法案将是一项节省成本的减排法案。

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In a word, the air quality can be improved gradually if we take more effective measures.

总之，如果我们采取有效措施，空气质量一定可以逐步提高。

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I am always amazed when a marketing machine is so fine-tuned, so elegant and effective that it can almost package and sell air.

我总是惊讶，当一个营销机器是如此细微调整，那么高雅与有效，它几乎可以包装、销售的空气。

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"The entrenched interests want to protect the status quo, and the apologists for those interests want to say they can't have effective energy and clean air at the same time, " said Gore spokesman Chris Lehane.

CNN: Gore to unveil plan to lower gas prices

He said he wanted to use experts from the air traffic control and airport industry to see how the airport can be made more effective and efficient.

BBC: Transport Committee