CNN: Despite the astronomical jump in clean-energy stocks in 2007, investors say 2008 will also be be a good year for most stocks in emerging energy technology. Driven by record oil prices that lifted the broader energy sector in general – and perhaps investor enthusiasm stoked by global warming fears – 2007 was a fantastic year to own renewable energy stocks. The WilderHill clean energy index – an index of 48 large U.S. stocks in the renewable energy sector – rose over 58 percent …