As the economy struggles, business has a new favorite word: sustainability. And starting today, as the City of Denver, CU's Leeds School of Business, and the trade nonprofit CORE begin their annual conference, the term gets a definition. WheSpeakers like Joseph Scalzo of WhiteWave Foods (think Silk products) and Bruce Nilles of the Sierra Club's National Coal Campaign will talk about how to manage environmentally conscious and financially responsible businesses, learn the strategies that will lead our economy forward. Tue-Thu, Mar. 17-Mar. 19, times vary Colorado Convention Center, 700 14th St., 303-228-8000 $200-$350, official website