| http://www.w3.org/ns/prov#value | - capacity for the next two decades.[???.] The agreement in this case is what???s called a power purchase agreement (PPA), in which an energy provider (First Wind in this case) agrees to sell energy to a buyer (such as Utah utility Rocky Mountain) at a fixed payment rate for an agreed-upon amount of time.[???.] In this case, the PPAs are a 20-year deal between First Wind and Rocky Mountain, for ener
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