Specific interests include: 1. Biogeotechnics: using plants and microorganisms to engineer soil structure and properties, and blue-green infrastructure engineering. 2. Bioenergy: using microbial fuel cells to explore energy storage/generation in soils/sediments. 3. Pollution management: engineering aspects of environmental remediation and emerging pollutants. 4. Resource recovery: nature-based/inspired solutions for value recovery from geological waste. For further details, see my website: https://profiles.cardiff.ac.uk/staff/harbottlem