That's rather strange. On two counts. One, given that naphtha is a much more expensive fuel than say furnace oil, how come nearly 80 per cent of all independent power producers (IPPS) have gone in for the costly route? And two, why has the government allowed it? In a letter addressed to state governments, dated October 7, 1996, P.K. Basu, director (IPC) in the ministry of power, wrote: "Large capacities based on fuels which have to be imported can't be sustained in the long run, and power generation on (sic) liquid fuels, especially naphtha, was not a preferred source.... State governments are requested to exercise utmost restraint." Consider the comparative costs of setting up and running a 100 MW power plant using naphtha and furnace oil. In you put up a combined cycle gas turbine (CCGT, a plant powered by gas or naphtha), it would cost Rs 300 crore. The alternative-diesel generator (DG) plant, which runs on furnace oil-costs 17 per cent higher at Rs 350 crore.