The French mega-utility is most concerned about a proposed reduction in support for biomass co-firing, but it would also be affected by any alterations to the country's wind-support regime.

Grzegorz Gorski, head of GDF Suez’s Polish unit, says the company will “demand several hundred million zlotys from the state” if the law goes ahead as planned. That would equate to a figure in excess of $50m.

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