Humans affect the world around us every day, but the moral, social, and ecological implications of our impact increase in our heavily globalized world. This is made especially clear in relation to climate change, the greatest environmental threat that our contemporary society faces and perhaps that any society has faced. Scientists agree that we are now experiencing the destructive effects of anthropogenic climate change in multiple ways, including extreme storms, droughts, and sea level rise. Climate change raises important questions about how humans value nature and what it means to care for the environment, as well as about justice among people and nations. Among the many questions that we must consider are these: What does it mean to care for the environment? Does nature have rights? Do animals have rights? To what extent should we preserve, conserve, or alter the natural world around us and furthermore, what implications does this have for those who inhabit this land? How do environmental problems affect the most vulnerable people, and what are the moral obligations of wealthier groups and nations? Most of all, a commitment to the common good challenges us to consider the repercussions (intended and unintended) that our actions have on ourselves, others, nonhuman nature, and future generations.