Lesley’s research fascination is human-environment relations, both conceptual and material. That is, Lesley seeks 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. Lesley has a particular focus on humans and plants. In recent years Lesley has worked mostly in cultural geography, with projects on backyard gardens, wheat and invasive plants. This developed from her earlier interest in Aboriginal land use, ethnobotany and fire. Lesley started her research career using palaeoecology and archaeology to study long term changes in the Australian landscape, and the interactions of prehistoric peoples with their environments.