My long-term research fascination is human-environment relations, both conceptual and material. That is, I want to understand how humans have physically changed earth’s systems, how we think about our place in nature, and how these two things are connected. I have a particular focus on humans and plants. In recent years I have worked mostly in cultural geography, with projects on backyard gardens, wheat and invasive plants. This developed from my earlier interest in Aboriginal land use, ethnobotany and fire. I started my research career using palaeoecology and archaeology to study long term changes in the Australian landscape, and the interactions of prehistoric peoples with their environments.