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An Overlooked Contributor to Climate Change: Leaky Pipes

These tricked-out, air sensor-equipped Google cars are helping to identify dangerous natural gas pipelines.

Photo by William J Sisti

Underneath the streets and sidewalks of American cities lie hundreds of thousands of miles of natural gas pipelines. The fuel is used to heat apartments, homes, and businesses from Boston to New York to San Francisco, and countless other cities and towns in between.

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