Dr. Efi Tritopoulou is a Chemical Engineer, NTUA, Ph.D, with more than 20+ years of experience in circular economy, waste management, and environmental and energy policies. Today she is President of the environmental organization NoWaste21, President of the Greek Women's Engineering Association (EDEM) and Senior Researcher at NTUA - Environmental Science & Technology Unit, Chemical Engineering School. She is the Scientific Coordinator of the circular economy project Nothing to Waste, an initiative and synergy of 24 businesses in Western Thessaloniki.