Karen Armstrong argues that if we want to avert environmental catastrophe, it is not enough to change our behaviour: we need to rekindle our spiritual bond with nature. For most of human history, nature has been held to be sacred, and our God or gods to be present everywhere in the natural world. Taking themes that have been central to the world's religious traditions - from gratitude and compassion to sacrifice and non-violence - Armstrong offers practical steps to help us develop a new mindset to reconnect with nature and rekindle our sense of the sacred.