This lecture explores the inequality in CO2 emissions based on income levels, highlighting how the wealthiest 10% contribute significantly more than the poorest 50%. It delves into global emission patterns, the impact of personal carbon footprints, and strategies for climate action, including mitigation, adaptation, financial aspects, and geo-engineering. The discussion extends to carbon budgets, emission reduction goals, and the role of carbon markets. The lecture emphasizes the importance of achieving net zero emissions globally and the necessity of negative emission technologies to combat climate change effectively.