He is the author of Enlightenment’s Frontier: the Scottish Highlands and the Origins of Environmentalism (Yale University Press, 2013) and, with Vicky Albritton, Green Victorians: the Simple Life in John Ruskin’s Lake District (University of Chicago Press, 2016). He is currently working on several projects, including a history of fossil fuel and science in the Victorian era and a critical study of the Holocene norm in Anthropocene science.