Alex Armstrong School of Geography, Earth and Environmental SciencesPhD student Contact details AddressSchool of Geography, Earth and Environmental SciencesUniversity of Birmingham Edgbaston Birmingham B15 2TT UK Alex Armstrong is a PhD candidate in Physical Geography, supervised by Prof Sami Ullah on a project titled: "Effects of atmospheric Nitrogen pollution on Soil Carbon Storage and Greenhouse Gas Emission from Forests Soils". Doctoral research SupervisorProfessor Sami Ullah