WASHINGTON, Jan. 29 [Category: Environment] -- The Sierra Club issued the following news release: * * * Indiana Regulators Approve Duke's Expensive Spending on Coal Indianapolis, Ind. - The Indiana Utility Regulatory Commission, which oversees monopoly electric utilities, approved Duke's excessive and wasteful spending on coal gasification at Edwardsport and agreed to prolong the use of coal at the Gibson coal-fired power plant, dealing a blow to customers struggling to pay their bills. Duke  more PR