Norsk Hydro (LSE: NHY.L - news ) shares rose 2.8 percent, the top gainer in the pan-European FTSEurofirst 300 index, after the aluminium maker posted second-quarter operating earnings above expectations in spite of weaker metal prices.
Refer to the input text as context and select the correct relationship between 'Norsk Hydro' and 'aluminium' from the available options.
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