Reflecting a global trend‎,‎ scores of countries have affirmed that their citizens are entitled to healthy air‎,‎ water and land‎,‎ and that their constitution should guarantee certain environmental rights‎.‎ This book examines the increasing recognition that the environment is a proper subject for protection in constitutional texts and for vindication by constitutional courts‎.‎ This phenomenon‎,‎ which the authors call environmental constitutionalism‎,‎ represents the confluence of constitutional law‎,‎ international law‎,‎ human rights and environmental law‎.‎ National apex and constitutional courts are exhibiting a growing interest in environmental rights‎,‎ and as courts become more aware of what their peers are doing‎,‎ this momentum is likely to increase‎.‎ This book explains why such provisions came into being‎,‎ how they are expressed‎,‎ and the extent to which they have been‎,‎ and might be‎,‎ enforced judicially‎.‎ It is a singular resource for evaluating the content of and hope for constitutional environmental rights‎.‎