"But that sort of thinking was in tension with my work. Over the years, I have helped leaders in business, politics, and other fields learn to lead on sustainability. These leaders can then change their organizations’ and constituencies’ cultures and practices to embrace sustainability. Even though corporate and policy choices matter more than those of any individual, I was still curious to see if I could make my own practices more sustainable. Personal responsibility matters to me, so polluting less motivates me; it's a small thing, but one I can control, even if it's important to make policy and political changes, too."