First and foremost, the boom depends on a free, liquid, competitive market in gas, underpinned by an extensive and well-regulated pipeline network.

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In 1984, he was picked to run Houston Natural Gas and engineered a merger with a rival firm in Nebraska to create Enron, which owned the first coast-to-coast pipeline network.

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Making that investment was a good start, but Trikona still hadn't developed a pipeline into the network of secretive family-run business groups that are usually the first to know about new deals coming up.

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Using gathering infrastructure that is shared across several smaller-scale biogas producers linked via a pipeline network to an upgrading facility, upgrading costs can be defrayed among all producers.

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Birmingham-based Severn Trent said on Wednesday that it had probably missed targets for stemming leaks from its pipeline network.

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However, the cable infrastructure is a shared network, which means that each user's connection is merged into a neighborhood-wide pipeline before being linked to the Internet.

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