1. 
Arnell NW. Hydrology and global environmental change. Harlow: Prentice Hall; 2002.
    
  
    2. 
Arnell NW. Hydrology and global environmental change. Harlow: Prentice Hall; 2002.
    
  
    3. 
Kump LR, Kasting JF, Crane RG. The earth system. 3rd ed. San Francisco: Prentice Hall; 2010.
    
  
    4. 
Ruddiman WF. Earth’s climate: past and future. New York: W. H. Freeman; 2001.
    
  
    5. 
Summerfield MA. Global geomorphology: an introduction to the study of landforms. Harlow: Longman Scientific & Technical; 1991.
    
  
    6. 
Sverdrup KA, Armbrust EV. An introduction to the world’s oceans. 10th ed. Boston [Mass.]: McGraw-Hill; 2009.
    
  
    7. 
Ward RC, Robinson M. Principles of hydrology. 4th ed. London: McGraw-Hill; 2000.
    
  
    8. 
Barry RG, Chorley RJ. Atmosphere, weather and climate. 8th ed. London: Routledge; 2003.
    
  
    9. 
Christopherson RW. Geosystems: an introduction to physical geography. 7th ed. Upper Saddle River, N.J.: Pearson/Prentice Hall; 2009.
    
  
    10. 
Kump LR, Kasting JF, Crane RG. The earth system. 3rd ed. San Francisco: Prentice Hall; 2010.
    
  
    11. 
Wright JB, Rothery DA, Open University. Oceanography Course Team. The ocean basins: their structure and evolution [Internet]. 2nd ed. Oxford: Butterworth-Heinemann; 1998. Available from: http://www.sciencedirect.com/science/book/9780750639835
   
  
    12. 
Wright J, Colling A, Open University. Seawater: its composition, properties and behaviour. 2nd ed. Oxford: Pergamon in association with the Open University; 1995.
    
  
    13. 
Barry RG, Chorley RJ. Atmosphere, weather and climate. 8th ed. London: Routledge; 2003.
    
  
    14. 
Colling A, Open University. Ocean circulation. 2nd ed. Oxford: ButterworthHeinemann; 2001.
    
  
    15. 
Colling A, Open University. Ocean circulation. 2nd ed. Oxford: ButterworthHeinemann; 2001.
    
  
    16. 
Park D, Wright J, Colling A, Open University. Waves, tides and shallow-water processes. 2nd ed. Oxford: Butterworth-Heinemann in association with the Open University; 1999.
    
  
    17. 
Barry RG, Chorley RJ. Atmosphere, weather and climate. 8th ed. London: Routledge; 2003.
    
  
    18. 
Maslin M. Global warming: a very short introduction. 2nd ed. Oxford: Oxford University Press; 2009.
    
  
    19. 
Barry RG, Chorley RJ. Atmosphere, weather and climate. 8th ed. London: Routledge; 2003.
    
  
    20. 
Ahrens CD. Meteorology today. 9th ed. Belmont, Calif: Brooks/Cole; 2009.
    
  
    21. 
Maslin M. Global warming: a very short introduction. 2nd ed. Oxford: Oxford University Press; 2009.
    
  
    22. 
Zachos J, et al. Trends, Rhythms, and Aberrations in Global Climate 65 Ma to Present. Science [Internet]. 292(5517):686–693. Available from: http://www.jstor.org/stable/3083539?seq=1#page_scan_tab_contents
   
  
    23. 
David M. Olson. Terrestrial Ecoregions of the World: A New Map of Life on Earth. BioScience [Internet]. Oxford University Press; 51(11):933–938. Available from: http://libproxy.ucl.ac.uk/login?url=http://www.jstor.org/stable/10.1641/0006-3568(2001)051%5B0933:teotwa%5D2.0.co;2
   
  
    24. 
Lewis SL, et al. The 2010 Amazon Drought. Science. 4 AD;331(6017):554–554.
    
  
    25. 
Lovelock J. Gaia: The living Earth. Nature. 18 AD;426(6968):769–770.
    
  
    26. 
Christopherson RW. Geosystems: an introduction to physical geography. 8th ed. Upper Saddle River, N.J.: Prentice Hall; 2012.
    
  
    27. 
Peter Francis. Atmosphere, earth and life [Internet]. Milton Keynes: Open University; 1997. Available from: http://copac.jisc.ac.uk/id/26068408?style=html&title=Earth%20and%20life.Atmosphere%2C%20earth%20and%20life
   
  
    28. 
Arnell NW. Hydrology and global environmental change. Harlow: Prentice Hall; 2002.
    
  
    29. 
Shiklomanov IA. Appraisal and Assessment of World Water Resources. Water International. 25(1):11–32.
    
  
    30. 
Oki T, Kanae S. Global Hydrological Cycles and World Water Resources. Science [Internet]. 25 AD;313(5790):1068–1072. Available from: http://libproxy.ucl.ac.uk/login?url=http://www.jstor.org/stable/3847070?seq=1#page_scan_tab_contents
   
  
    31. 
Ward RC, Robinson M. Principles of hydrology. 4th ed. London: McGraw-Hill; 2000.
    
  
    32. 
Holden J. An introduction to physical geography and the environment. Harlow: Pearson Prentice Hall; 2005.
    
  
    33. 
Alexander D. Natural disasters. London: UCL Press; 1993.
    
  
    34. 
Ward RC, Robinson M. Principles of hydrology. 4th ed. London: McGraw-Hill; 2000.
    
  
    35. 
Hiscock KM. Hydrogeology: principles and practice. Malden, Mass: Blackwell; 2005.
    
  
    36. 
Kaser G, Osmaston H. Tropical glaciers. Cambridge: Cambridge University Press; 2002.
    
  
    37. 
Kaser G, Großhauser M, Marzeion B. Contribution potential of glaciers to water availability in different climate regimes. Proceedings of the National Academy of Sciences of the United States of America [Internet]. 23 AD;107(47):20223–20227. Available from: http://libproxy.ucl.ac.uk/login?url=http://www.jstor.org/stable/25756679?seq=1#page_scan_tab_contents
   
  
    38. 
Taylor RG, et al. Recent glacial recession and its impact on alpine riverflow in the Rwenzori Mountains of Uganda. Journal of African Earth Sciences. 55(3–4):205–213.
    
  
    39. 
Ward RC, Robinson M. Principles of hydrology. 4th ed. London: McGraw-Hill; 2000.
    
  
    40. 
Ollier C, Clayton KM. Weathering. 2nd ed. London: Longman; 1984.
    
  
    41. 
Strahler AN. Physical geography. New York: Wiley; 1951.
    
  
    42. 
Summerfield MA. Global geomorphology: an introduction to the study of landforms. Harlow: Longman Scientific & Technical; 1991.
    
  
    43. 
David L. Linton. The Problem of Tors. The Geographical Journal [Internet]. 121(4):470–487. Available from: http://libproxy.ucl.ac.uk/login?url=http://www.jstor.org/stable/1791756?origin=crossref&seq=1#page_scan_tab_contents
   
  
    44. 
Ollier C, Clayton KM. Weathering. 2nd ed. London: Longman; 1984.
    
  
    45. 
Summerfield MA. Global geomorphology: an introduction to the study of landforms. Harlow: Longman Scientific & Technical; 1991.
    
  
    46. 
Taylor RG, Howard KWF. Post-Palaeozoic evolution of weathered landsurfaces in Uganda by tectonically controlled deep weathering and stripping. Geomorphology. 25(3–4):173–192.