Martin Denholm says wind power is taking off in the US. And big players such as T. Boone Pickens and Michael Blooomberg are throwing their weight behind the industry.

For investors who want to minimize risk in a relatively new industry, Martin recommends General Electric (NYSE:GE) and Siemens AG (NYSE:SI). These blue chips are making significant investments in wind energy projects.

Meanwhile, small-cap AeroVironment (NASDAQ:AVAV) is well placed in the emerging market of home and office-based wind power generation.