Reliance Natural had wanted Reliance Industries to honor a private deal between the brothers, struck when the Reliance empire was split, to supply it with 28 million cubic meters, or 989 million cubic feet, of gas for 17 years at $2.34 per cubic meter, about half the government-set price.
Most of this activity involves the use of natural floodwater, although reliance on artificially impounded storage has increased rapidly.
In May, Reliance Natural lost a case before by India's highest court in a dispute with Reliance Industries, controlled by Mukesh Ambani.
Other attributes are its rich natural resources, less reliance on exports relative to its neighbors, and its growing consumer class which fuels 65% of GDP.
They said the so-called renewable portfolio standard would reduce the nation's growing reliance on natural gas.
Japan's lack of natural resources, and increasing reliance on expensive fossil fuel imports, mean the government feels it has no choice, despite the majority opposing nuclear power.
The group also said that the carbon emission rules could increase reliance on natural gas, making power generation vulnerable to supply interruptions.
He said in places where prices are high, a primary cause is reliance on natural gas, a costly fuel, to generate power during peak demand.
The European Gas Advocacy Forum report has shown that in the next 20 years Europe could save about €500bn by more reliance on natural gas and less on coal.
Along with the energy companies courting it, Ukraine sees shale as potentially altering the geopolitics of natural gas, lessening global reliance on Russia and the Middle East.
