Harry is an ecologist specialising in carbon dynamics of plant/soil systems, air pollutant emissions inventories, ambient dust pollution monitoring and issues relating to persistent organic pollutants (POPs).
Harry’s PhD was on the investigation of carbon dynamics in soil-plant systems using stable carbon isotope (13C) pulse-labelling techniques. This work involved helping to set up and deploy a unique mobile laboratory capable of continuously monitoring the CO2 concentrations and 13C:12C isotopic ratios of soil/plant respiration in the field.
He has produced an air pollutant emissions inventory preparation manual used for capacity building in developing countries. This has resulted in the compilation of emission inventories by countries in S. Asia (Bangladesh, Bhutan, Nepal and Sri Lanka) and southern Africa (Botswana, Malawi, Mozambique, South Africa, Tanzania, Zambia and Zimbabwe). In most cases, these are the first national air pollutant inventories ever produced by these countries.
Harry also helped to develop the Frisbee Dust Deposit Gauge, now widely used in the UK, as well as devising "likelihood of nuisance guidelines" for monitored ambient dustfall.
His POPs work involved writing the working paper for an international workshop on POPs and editing the final consensus report "Controlling persistent organic pollutants - what next?"