He makes discoveries on how carbon-rich ecosystems such as forests, wetlands and peatlands function and interact with the atmosphere. With expertise in quantifying the exchange of powerful greenhouse gases from these ecosystems and agroecosystems in response to global environmental change he has led projects across the Andes, Amazon, Borneo and Sumatra as well as many other locations. The former director of the NERC MethaneNetwork holds a Professorial Fellowship at the University of Birmingham, School of Geography, Earth and Environmental Sciences with affiliations to the Birmingham Institute of Forest Research (BIFoR) and the Birmingham Institute for Sustainability and Climate Action (BISCA), while maintaining his visiting Chair in Global Change Ecology at the Open University.