That they are not including the cost of connecting wind power to the grid, the necessary costs of dealing with variablesupply, of needed back up and so on.
In time they buried some 380, 000 miles of pipelines throughout the United States, which now handle 63 billion cubic feet of natural gas and 20 million barrels of crude a day, removing a crucial variable from the supply chain and stabilizing markets.
Of course, more distributed generators contributing variable renewable energy to the grid means an increasing challenge to regulate the consistency of supply and demand.