Lewis is a Lecturer in Environment and Human Health at the European Centre for Environment and Human Health (ECEHH).

His research principally concerns the benefits that the natural environment has on human physical health and psychological well-being. He primarily uses quantitative methods and the analysis of large surveys in his work, though he has experience of experimental and intervention research as well. Some of the projects he works on, or have worked on, include:

• BlueHealth – looking at the human health benefits of Europe’s coasts and waterways
• GroundsWell – looking at community-led systems transformation of green and blue spaces for the benefit of population health
• RENEW – looking at human dimensions of biodiversity renewal in the UK.
• Smartline – looking at how everyday technology can benefit the health and happiness of people in social housing in Cornwall, UK
• What does blue do for you? – looking at the potential that aquatic natural environments have in shaping the well-being of people with bipolar and psychosis

As for teaching, Lewis leads a module on Nature, Health, and Well-being for the MSc Environment and Human Health where he also lectures on quantitative methods and statistics. He co-convened a CPD course on the same topic. Lewis also lectures or leads research groups for the BMBS programme, BSc Medical Sciences, and for a module on Oceans and Human Health. He has recently provided guest lectures for the Universities of Bath (nature and physical activity) and Edinburgh (questionnaire design for people-environment studies).