New Delhi, Aug. 22 -- A new U.S. Dept. of Energy study shows that the cost of generating more power through wind turbines is cheaper now than buying fuel at an expected price from an equivalent natural gas plant.

That means wind will become even more competitive in capturing more power capacity in coming years with natural gas expected to lose share. Solar power is on the same playing field as wind, and is also expected to see real growth.

The report shows that wind hardware prices are dropping, even as new turbine designs are increasing power generated by each turbine that typical in its usage.

Some of that savings is coming from a tax credit given to renewable energy in the US. That tax credit will be fading out in coming years, brin...