1. Institute for Interdisciplinary Sustainability Research and Education, New Delhi 10019, India
2. Department of Geography, University of Calcutta, Kolkata 700019, India
3. Q-Step Centre, School of Social Policy, Sociology and Social Research (SSPSSR), University of Kent, Canterbury CT2 7NF, UK
4. College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China
5. Institute of Geographical Sciences, Physical Geography, Freie Universität Berlin, Malteserstr. 74-100, 12249 Berlin, Germany