For decades, social scientists have searched for factors that shape pro-environmental behaviour. However, only a few studies have investigated the causes and consequences of participation in environmental organizations. The main aim of this project is to fill this gap by analyzing in detail the determinants of environmental participation and its consequences in different parts of the world. The authors shed light on who is liable to participate and will help to see whose priorities and values are forwarded through voluntary activities and to what extent voluntary participation can become representative. Thus, the book provides a unique examination of citizens' willingness to participate in environmental organizations.