An old problem: Aging pipelines lead to deadly explosions

  • A house on Herrick Road in North Andover, Mass., is seen Friday, Sept. 14, 2018. The home was one of multiple houses that went up in flames on Thursday afternoon after gas explosions and fires triggered by a problem with a gas line that feeds homes in several communities north of Boston (AP Photo/Mary Schwalm)

The natural gas pipeline in the United States is vast, sprawling across 2.5 million miles in a complex pressurized system that delivers a quarter of the energy consumed nationwide, according to the American Gas Association. Many of the pipes are old, and utilities are in various stages of replacing them to improve safety.

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