Inter Press Service: A natural gas explosion in San Bruno, California that almost decimated an entire city earlier this month has fuelled concerns about the outdated, aging, and dangerous gas pipelines that underlie many U.S. cities. Television stations across the U.S. broadcast dramatic images of firefighters spraying water on the gigantic fires which followed the explosion on Sep. 9 and destroyed 37 homes, killed eight people, and injured over 50 others. “A full investigation must take place in …