1. Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, Italy
2. Department of Earth and Environmental Sciences, University of Pavia, Pavia, Italy
3. Department of Earth and Marine Sciences, University of Palermo, Palermo, Italy
4. Department of Earth, Environment and Life Sciences, University of Genoa, Genoa, Italy
5. Royal Geographical Society, London, UK