But the ruling set an important precedent for treating carbon dioxide as a threat to human welfare, and opens the way to regulating it by tightening fueleconomy standards.

但是这项裁决第一次明确的把二氧化碳作为对人类的幸福的威胁，并且为通过严格节能的标准来控制二氧化碳的排放开辟了道路。

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Next, we examined gas mileage, as reported on the official source for fuel economy, www.fueleconomy.gov.

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The sedan gets a combined city and highway fuel economy rating of 33 mpg, according to fueleconomy.gov.

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The EPA invites vehicle owners to share their mileage on its fueleconomy.gov website.

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