Hugh Hunt’s research centres on the control of noise and vibration from underground railways, but he also became involved in geoengineering as Co-Investigator on the SPICE project 2010-15 looking at various aspects of solar radiation management, www.spicepipe.co.uk. His responsibility was an outdoor experiment to evaluate the influence of wind on the motion of a tethered balloon, although controversy over geoengineering experiments led to the testbed being cancelled. He is now promoting other technologies for the removal of non-CO2 greenhouse gases, and runs the Cambridge Climate Lecture Series, which aims to raise awareness of the urgency around climate change.