"Xcel
Energy is a utility company with millions of electric customers in the
middle of the country, from Texas to Michigan. In booming Colorado, the
company asked for proposals to construct big power plants using wind
turbines and solar panels.
The
bids have come in so low that the company will be able to build and
operate the new plants for less money than it would have to pay just to
keep running its old, coal-burning power plants."
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