This lecture covers the principles of climate change metrics, including Global Warming Potential (GWP) and Global Temperature Potential (GTP). It explores the impact of emissions on temperature, the development of mitigation strategies, and the implications for policy goals such as the Paris Agreement. The instructor discusses the differences between GWP and GTP, the concept of Absolute GTP, and the importance of choosing the right emission metric. The lecture also delves into the Arctic and Antarctic amplification, sea ice projections, and the significance of the Arctic region in climate change research.