(Bloomberg) — European renewable-energy stocks, battered for much of this year, present a buying opportunity because their growth story remains intact. That pitch from Goldman Sachs is luring some investors — those not in a hurry, that is.The way Goldman tells it, with governments promising to phase out fossil fuels and the environmental, social and governance mantra still resonating, the sector is bound to eventually provide rich rewards for the long-term investor. RBC Wealth Management concu

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