Thanks to Ohio's renewable portfolio standard, renewable-energy generators have driven down the wholesale cost of electricity in the state by about 0.15% and as much as 0.5% if plants under construction are included, according to a study by Tim Benedict, an economist with the Public Utilities Commission of Ohio. Furthermore, renewable-energy generators in the state are cutting greenhouse-gas emissions by 0.17%, that grows to 0.5% if facilities under construction are included.

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