It was then that Hsu read Rachel Carlson's book Silent Spring, which alerted him to how what had happened to America's environment was happening in Taiwan, too, and awakened his passion for environmental issues.
當時他閱讀美國學者瑞秋．卡森所著的《寂靜的春天》，印證了美國的環境浩劫也正在台灣發生，引發他對生態議題的重視。