This course is designed to explore the interplay between economic systems and the natural environment. This course delves into the theories and practices used to evaluate environmental goods and services, with a focus on understanding the impact of economic activities on the environment and identifying sustainable solutions. Key topics include the principles of welfare economics, and various methodologies for valuing environmental goofs, Students will learn to conduct Cost-Benefit Analyses, addressing uncertainties, distributional effects, and equity considerations. Through cases studies and hands-on exercises, the course aims to equip students with the skills needed to assess environmental policies, make informed decisions, and contribute to the development of sustainable economics practices.