P hilipp Lehmann is a PhD candidate in the History Department. He received his A.B. from Princeton University in 2006 and his MPhil in Modern European History from the University of Cambridge in 2008. Philipp works on theories of climate change and desertification and their relation to projects of environmental transformation in the late nineteenth and early twentieth century. His research focuses specifically on the intellectual and technological context of large engineering schemes to transform desert environments into arable land, such as François Roudaire's project of the "Sahara Sea" in the 1880s and Herman Sörgel's 1920s vision of Atlantropa, a geo-engineered new Euro-African continent. At the Center for History and Economics, Philipp coordinates the Energy History Project.