In a study published in the journal Ambio, scientists found that lead levels in soil in the North-eastern United States had decreased markedly since the introduction of unleaded gasoline.

在《人类环境杂志》上发表的一项研究称，科学家们发现，自引进无铅汽油以来，美国东北部土壤中的铅含量已经显著下降。

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The retail price of unleaded gasoline has fallen by just 13% over the same time period.

无铅汽油的零售价在同期只下跌了13%。

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It runs on premium unleaded gasoline, which is both cheaper and more environmentally friendly than jet fuel.

它以优质无铅汽油燃料，不仅比飞机燃料更便宜，也更环保。

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Like every new Continental, the new GT Coupe can run on both standard unleaded gasoline and sustainable bioethanol (up to E85) or any mix of the two.

FORBES: Bentley Unveils New Continental GT Coupe

But it is, again, a false promise to make by any politician that they have a 3-point plan -- that a 3-point plan exists that can guarantee a certain price for unleaded gasoline at your local Exxon or Sunoco or Chevron station.

WHITEHOUSE: Press Briefing

The state of Nebraska has tracked gasoline and ethanol prices since 1982, and despite all the financial incentives for ethanol, the average annual price of ethanol had exceeded the price of gasoline in every single year on record through 2005. (See Ethanol and Unleaded Gasoline Average Rack Prices).

FORBES: Washington's Foolish Fuel Policy