In this essay the author proposes ten reasons for involving the world’s religions in the environmental debate. The ten reasons offer important keys for understanding the religious declarations of recent years as valid strategies for personal, institutional, and social transformation. The author seeks to open up the prophetic, ascetical, penitential, apocalyptic, sacramental, soteriological, mystical, wisdom, communitarian, and eschatological dimensions that pervade the spiritual experience of humankind.