As can be seen by the current economic crisis and issues regarding global warming, leading organizations in the 21stcentury is very challenging and requires new approaches.
Leading a sustainable organization involves stretching the organization to re-envision how it uses its resources, not only natural resources, but its workforce and business partnerships.
Cruising the Internet, one can easily see how major organizations are responding to the call to be sustainable, to be more green and thus decrease their "carbon footprint.” Just check out their Corporate Social Responsibility section on their websites.