Greg Staple is chairman of Washington DC clean-energy provider Renewable Power Direct (RPD). A Federal Energy Regulatory Commission-authorised wholesale power marketer, it is heavily involved in working with the corporate sector to buy largely wind power.

Your company acts as a broker between developers and corporate America?

We’re actually more than a broker... we work in tandem with Tenaska Power Services, which provides us trading services, to craft bilateral deals for renewable power -- say a wind generator that hasn’t fully contracted all of its output -- in competitive markets, such as Ercot [the Electric Reliability Council of Texas].