A glut of natural gas in North America has made the commodity relatively inexpensive, but increased demand abroad has prompted some of the world's biggest energy firms to scramble to build export facilities. Plans for billions of dollars' worth of projects should help boost the economies of the U.S. and Canada. Meanwhile, some companies, such as Dominion Virginia Power, are investing in natural gas facilities in the U.S. to meet the increasing demand for electricity and deal with the reduction in supply that is coming from coal-fired plants that are closing.

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