The plan is have 500 varieties of crop seeds in the facility, a backup system or Doomsday Vault for the world's food.

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Neither solar nor wind are powerful enough to carry the heavy load that a backup generator must provide to a facility such as a hospital or a school or a county prison.

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The Gateshead facility also serves as a backup plant for the Bank of England, which has a separate contract with De La Rue to print British pounds, according to a Bank of England spokesman.

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By serving as a backup source of liquidity for borrowers, the Fed's commercial paper facility was aimed at reducing investor and borrower concerns about "rollover risk, " the risk that a borrower could not raise new funds to repay maturing commercial paper.

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