Cristina Calheiros is an Environmental Engineer with a PhD in Biotechnology. Currently is a Research Scientist at CIIMAR, University of Porto, Coordinator of the Centre for Monitoring and Environmental Interpretation (CMIA, Vila do Conde), Adjunct Professor at University of Saint Joseph (SAR Macao, China) and Invited Professor at the Faculty of Sciences of the University of Porto. She is Vice-President of the Portuguese National Association of Green Roofs (ANCV) and board member of The Portuguese Water Resources Association (APRH) (north region). Integrates the Editorial Board of the Circular Economy and Sustainability journal (Springer), and she is a guest editor for several special issues at Elsevier, MDPI, and Frontiers journals. Integrates several COST Actions, namely CA17133-Implementing nature-based solutions for creating a resourceful circular city; CA20133 - Cross-border transfer and development of sustainable resource recovery strategies towards zero waste; and CA20138 - Network on water-energy-food nexus for a low-carbon economy in Europe and beyond (nexusnet). Her work focuses on developing nature-based solutions, such as green roofs, vertical gardens, constructed and floating wetlands, towards sustainability of territories, ecosystem services provision, and as tools for climate change adaptation and mitigation. Also dedicated to the application of phytotechnologies (such as phytoremediation, bioremediation), treatment and valorization of water, soil and solid waste, circular economy, circular cities, sustainable tourism, rural development and integrative productive practices, permaculture, geoethics, education for sustainability and environmental education. Responsible for providing educational resources, training (more than 1000 hours), and coordination in higher education courses, technological specialization courses, modular training, and Lifelong Training. Develops an active role in the communication of Science-Technology-Society and outreach through short courses, talks, dissemination actions, training, exhibitions, technical visits and multimedia channels. She participated in several business model iteration programs for technologies developed in academia. In the last 5 years participated in 10 funded international and national projects related to nature-based solutions. Background: Her internship was at Slater Limited-Environmental Biotechnology and at Imperial College of Science Technology and Medicine-UK, related to phytoremediation of contaminated soils. After her doctorate, she was awarded a 6-year postdoctoral scholarship at the Centre for Biotechnology and Fine Chemistry (UCP), in collaboration with Aarhus University-Denmark, related to the biological treatment of domestic waters with constructed wetlands, and where she also developed work in the area of green roofs. Between 2016-18 had a postdoctoral scholarship at CIIMAR, developing work with floating islands in port marinas.