A green/living roof is a vegetated rooftop system that is installed over a roof's waterproofing membrane and confers a multitude of benefits and performance impacts to the underlying building. Green roof technologies not only provide the owners of buildings with a proven return on investment, but also represent opportunities for significant social, economic, and environmental benefits, particularly in cities. While these technologies are implemented around the world, many of their benefits and processes are poorly understood by designers, specifiers, and policymakers. These short presentations are designed as a basic introduction to green roof technologies - what composes them, how they function, and what benefits they convey. Whether you know nothing about green roofing, or are looking to refresh on the basics, this is the course for you.