Green energy is one of the biggest trends right now, and investors are understandably interested in identifying attractive green energy stocks for their portfolios.

In this video, Motley Fool analyst John Reeves talks with David Meier, who manages a portfolio called Trends and Trades for Fool.com, about his favorite green energy stock idea. Dave highlights a biofuel maker whose product may become price-competitive with oil someday soon. That would be a dramatic breakthrough since this company's fuel burns with reduced emissions.