Reuters: In what is being called a “green gold rush,” global investment in renewable energy surged some 60 percent to US$148 billion in 2007, a UN agency said on Tuesday. Buoyed by soaring fossil-fuel prices and concerns over the carbon dioxide emissions that fuel global warming, investment in clean energy from sources like wind, solar and biofuels last year rose three times faster then predicted by the UN Environmental Programme (UNEP). “Just as thousands were drawn to California and …