The siren call of 2020 corporate environmental sustainability goals is quickly getting louder, as corporate leaders realize they must go further today to achieve their sustainability targets for tomorrow. Increased use of renewable energy is an ambitious goal for some of the world’s largest companies, as 59 percent of the Fortune 100 and nearly two-thirds of the Global 100 have set GHG emissions reduction commitments, renewable energy commitments or both, according to a recent Ceres’ report, Power Forward: Why the World’s Largest Companies Are Investing in Renewable Energy. One global consumer products company, for example, plans to derive 30 percent of its energy from clean sources by 2020.