In Cradle to Cradle: Remaking the Way We Make Things, German chemist Michael Braungart explains that the world's industrialized nations have had a difficult time achieving their recycling objectives in spite of well-developed recycling systems.
著有《從搖籃到搖籃》一書的德國化學教授麥克．布朗嘉解釋，今天工業國家雖有完善的回收體系，但幾乎難以真正達成回收目的。