Creating visions for nature and people that tackle the linked sustainability challenges of climate change, biodiversity loss and human development and translating them into timely solutions is the focus of the 2019 Mitchell Lecture on Sustainability at the University of Maine. E.J. Milner-Gulland, Tasso Leventis Professor of Biodiversity at the University of Oxford, will present read more Mitchell Lecture on Sustainability to focus on ‘optimistic vision’ for world