Can—and should—participation be a means of achieving sustainability? The concepts of sustainability and participation are both in vogue, and many international, supranational and national legal texts and standards refer to these two concepts. However, there are still several unanswered questions that invite legal inquiry: which sustainability? Which kinds of participation? Participation by whom? How are the two concepts of sustainability and participation effectively interlinked in legal provisions? This book approaches the interconnection between sustainability and participation inductively and precisely in areas of law which are commonly associated with sustainability and sustainable development: national, European and international environmental and economic law.