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CO Natural Gas Company That Funded O'Dea Super PAC Fined $3.25 Million For Violating Clean Air Laws
Will Hydrogen Save U.S. Natural Gas Utilities? Investors Certainly Hope So - Bloomberg
Sempra boss says company is OK with San Diego City Council plan to eliminate natural gas - The San Diego Union-Tribune
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Energy Co-op bringing renewable natural gas service to Philly - WHYY
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