In the 1950s, when the U-shaped natural gas pipeline connecting Alaska to California was first proposed, it was the only natural gas supply in the world that was not being delivered by the U S. government.
In the 1970s, however, natural gas supplies from the Middle East and China were starting to become a major source of supply.
Natural gas became a major component of U. S. energy supplies in the 1990s, and the U s gas supply has grown rapidly since then.
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