PhD in Geography and Environmental Engineering Faculty Advisers
![Peter DeCarlo man wearing glasses, shirt and suit jacket, standing outdoors](/sites/default/files/styles/people_card_360/public/2022-05/peter-decarlo.png?h=58c8a5e7&itok=2FcVNuHp)
Peter studies the chemical composition of gas particles in the air to improve our understanding of climate, air quality, and health impacts of pollutants.
![close up of man smiling wearing white shirt J. Hugh Ellis](/sites/default/files/styles/people_card_360/public/2022-05/j-hugh-ellis.jpg?h=cc872d96&itok=FxUrbgxZ)
An expert in environmental systems analysis, Hugh's innovative models and analysis are integral to critical, policy-shaping research studies ranging from climate issues to public health.
![Paul Ferraro man smiling standing in hallway](/sites/default/files/styles/people_card_360/public/2022-05/paul-ferraro.jpg?h=199d8c1f&itok=ZRSEm2lE)
Paul is a Bloomberg Distinguished Professor with joint appointments in the Department of Environmental Health and Engineering and the Carey Business School. He is known for his research on behavioral economics and the design and estimation of impacts of environmental programs.
![Ciaran Harman man wearing glasses, smiling, standing outside of building](/sites/default/files/styles/people_card_360/public/2022-05/ciaran-harman-horizontal.jpg?h=170ba4b8&itok=rpcqcIuR)
Ciaran, an associate professor of landscape hydrology and Russell Croft Faculty Scholar, studies how the structure of landscapes controls the movement of water from rainfall to streams, and how that structure evolves over time.
![](/sites/default/files/styles/people_card_360/public/2021-10/benjamin-hobbs.jpg?h=58c8a5e7&itok=NwkFm57J)
Ben, the Theodore M. and Kay W. Schad Professor of Environmental Management, uses systems analysis and economics to improve electric utility planning, operations, and policy, as well as management of environmental and water resources systems.
![Carsten Prasse man standing outisde against wall the Johns Hopkins sign in background](/sites/default/files/styles/people_card_360/public/2022-05/carsten-prasse-horizontal.jpg?h=7eabb7da&itok=uKwvHip2)
Carsten's research focuses on the occurrence and fate of organic contaminants in the urban water cycle and their impact on environmental and human health.
![Scot Miller man smiling standing in front of building](/sites/default/files/styles/people_card_360/public/2022-05/scot-miller-horizontal.png?h=3e43625b&itok=rIHQx2p7)
Scot Miller combines satellite data and statistics to understand greenhouse gas emissions across the globe.
![Sarah Preheim close up of woman smiling standing outdoors](/sites/default/files/styles/people_card_360/public/2022-05/sarah-preheim_0.jpeg?h=2ab9529e&itok=m-uB-39W)
Sarah Preheim studies the microorganisms and environmental drivers of impairments to inland and coastal water bodies such as oxygen depletion and algal blooms.
![Harihar Rajaram man smiling standing in front of chalkboard with mathematical equations](/sites/default/files/styles/people_card_360/public/2022-05/harihar-rajaram.png?h=bbfd5eb3&itok=28bd8lM3)
Harihar uses mathematical models to shed light on complex environmental and earth systems and to predict future trends within those systems.
![close up of man wearing glasses looking away from camera](/sites/default/files/styles/people_card_360/public/2022-05/alan-stone.jpeg?h=5e6d932b&itok=KSzvQt_8)
Alan employs chemistry foundations to biogeochemical processes to address issues of anthropogenic chemicals in the environment and engineered systems.