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Compromised oil and gas wells pose risks to groundwater in Weld County | Environmental Engineering Program | University of Colorado Boulder
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New study reveals key factors for estimating costs to plug abandoned oil and gas wells
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In Colorado, What's The Lifespan of An Oil And Gas Well? | Colorado Public Radio
Oil well - Wikipedia
New tools could improve the way cement seals oil wells | MIT News | Massachusetts Institute of Technology
How Does Oil and Gas Fracking Work? - Hill Country Exploration, Inc.
