Few issues are more urgent than global warming. Our health, welfare, and existence on this planet depend on addressing this urgent matter. The course will examine the past, present, and potential future of the human impact on Earth's climate. We will follow the long story of carbon as it shapes the world, especially since the advent of the Industrial Revolution and the expansion of habitat destruction, resource extraction, and burning of fossil fuels. We will then consider the emergence of a climate consciousness over the past century, and more recent efforts by governments, NGOs, multilateral institutions, and activist networks to address the crisis. Finally, the course will study several possible paths to net zero--that is, a global society with no net contribution of carbon to the atmosphere. Issues of race, social justice, and the role of activists and indigenous organizations will be central to our examination.