Many years ago, when I was first pegged as a "sustainable landscape designer," I gave a talk to a group of students enrolled in one of the world's first sustainable design courses at Schumacher College in England. I was surprised during the question and answer period that almost all the students' questions were not about their work, but revolved around how they could address issues of sustainability in their personal lives. How they could conserve energy and water in their households, for example—it was these questions that started me on the path to writing and publishing my book,