Garvin Heath, PhD, is a senior scientist at the National Renewable Energy Laboratory (NREL) in Colorado, USA. For over 10 years he has worked to characterize and quantify sustainability of energy technologies, with particular focus on photovoltaics (PV). He served on the Joint (steering) Committee that has published the Sustainability Leadership Standard for PV Modules and Inverters and advises governments and companies about sustainability practices and end of life management for renewable energy technologies. Dr. Heath has led the International Energy Agency's Photovoltaic Power Systems (PVPS) Technology Collaboration Programme Task 12: Sustainability for the past 7 years. From PV-specific life cycle assessment and net energy analysis methodological guidelines to global reviews of technologies and policies for recycling PV modules, Task 12 is a thought leader in global PV sustainability and circular economy.