1. Department of Geography, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
2. School of GeoSciences, University of Edinburgh, Edinburgh EH8 9XP, UK
3. School of Environmental Science, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
4. School of Earth and Environmental Sciences, University of St. Andrews, St. Andrews KY16 9AL, UK
5. Department of Earth, Environment and Planetary Sciences, Rice University, Houston, Texas 77005, USA
6. Practical Action Consulting, Kathmandu 15135, Nepal