We are living under several crisis: resources management, climate change, biodiversity, and pollution. Our ecological footprint surpassed the limits of the planet. In 2015, in the United Nations, all the countries approved 17 Sustainable Development Goals. This course will look at the main domains of a functionable planet (earth, air, and water), and provide key tools and practices that are crucial to understand, assess, and report the efforts towards a greener planet.