This case study explores the challenge of reducing New York City’s greenhouse gas emissions by 80% by 2050. It covers designing a comprehensive emissions reduction plan, considering factors like clean energy initiatives, cost implications, and implementation strategies. The case examines the potential of emissions trading programs, analyzing their pros and cons. It also delves into the city’s emissions data, highlighting key areas for reduction such as residential buildings and heating. The study addresses implementation challenges, including transparency in policy-making and the potential use of subsidies for LEED-certified buildings. Throughout, candidates are encouraged to think creatively about solutions while considering various stakeholders and economic impacts.