I am Research Professor at the Faculty of Law, North-West University, South Africa. My research concentrates on global environmental law, with an emphasis on its intersecting formal/governance and substantive aspects. I focus on three interrelated themes that I approach from a transnational perspective: environmental constitutionalism (human rights, socio-ecological justice, vulnerability); law and the Anthropocene; and Earth system law. I am also Senior Professorial Fellow in Earth System Law at the University of Lincoln. I serve as co-convenor of the Taskforce on Earth System Law;,and as assistant editor of the journal, Earth System Governance. I am also a member of the ESG Network’s Scientific Steering Committee.