Reuters: An underground natural gas pipeline rupture that caused the largest-ever methane leak in California has been permanently capped, paving the way for thousands of displaced Los Angeles residents to return home, state regulators said on Thursday.
The leak, which began in October and accounted for a fourth of all daily methane emissions statewide at its height, was confirmed by a series of independent laboratory tests to have been successfully sealed as of Wednesday night, officials said.
The leak...