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July 17, 2014
WASHINGTON — Cities such as Indianapolis that regularly replace old natural gas lines have significantly fewer leaks than older urban areas where they don't, like Boston and New York City's Staten Island, according to a new study by Google and an environmental group.
Using a gas-sniffing device attached to Google's city-mapping cars and new statistical calculations that determine rough leak rates, the Environmental Defense Fund measured the key component, methane, in the streets of the three cities.
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