CEOs of some of the world's biggest companies are starting to get the sustainable-business bug because they've realized that going green can be an easy way to save money. Cutting packaging, fuel and raw-materials costs gives companies insurance against market volatility, managers say. "We are able to do the right thing for the organization from a financial return and significantly reduce our greenhouse gases. We find the sweet spot in both," said PepsiCo executive Mike O'Connell. Learn more about the AICPA's efforts on sustainability at AICPA.org.