Jim Cramer told investors that a new trend is quickly emerging for alternative-energy stocks. He explained that wind-power and solar stocks are holding up and trading higher, while the price of oil is falling rapidly. Cramer said this is proof that the strength in the alternative energy sector is for real. He predicted that the green stocks have four more years of strength and he reiterated his buys on Owens Corning (OC), Trinity Industries (TRN), and Mastec (MTZ). Cramer said Trinity is his favorite play in the wind complex. For the solar space, Cramer said investors should buy First Solar (FSLR) because the company is best of breed in the sector. He pointed to the recent earnings report from First Solar where the company blew away estimates and upped its full-year guidance. Cramer did warn investors that the alternative energy stocks could get hurt if the investment tax credit for wine and solar power doesn’t pass the Congress. He explained Congress is delaying the passing of the bill and it could cost the sector $11 billion as companies put projects on hold as they await the outcome. Cramer thinks the bill will eventually pass. “I think the case for investing in wind is being made,” Cramer said. “And I still think that solar has legs. It’s Green Day every day from now on in Cramerica.” Wind Stocks are all the rage this year. Read why WNEA may be the single best play in this sector today!