Cenpower Generation Co., an independent power producer in Ghana, will switch to using natural gas instead of light crude oil to fuel its electricity plants under an agreement that will save the government $3 billion over the next two decades.

The deal is among a series of power deals that the government is renegotiating with independent producers to cut costs, the Finance Ministry said in an emailed statement Wednesday. Ghana began renegotiating power deals with IPPs in November.

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