Impact of nuclear energy needs more study before getting green label: EU A mustard field is seen in front of the cooling towers of the Temelin nuclear power plant near the South Bohemian city of Tyn nad Vltavou, Czech Republic. Photo: Reuters/File Reuters, Brussels Reuters, Brussels The European Union should do more research on the potential harm caused by nuclear power before deciding whether to label it as a sustainable investment, one of the two expert committees tasked with assessing the fuel's green credentials said on Friday. Brussels is mulling a decision on whether to include nuclear energy in its sustainable finance taxonomy, a list of economic activities that will from next year define which can be labelled as green investments.