1. UNESCO, 2019. The United Nations World Water Development Report 2019: no one left behind. 11 Chapters, 186 p., Paris. Online. https://en.unesco.org/publications/world-water
2. NOAA, Earth System Research Laboratory, Global Monitoring Division, 2020. Online. www.esrl.noaa.gov/gmd/ccgg/trends C. D. Keeling, Scripps Institute of Oceanography
3. Immerzeel, W. W., and 31 co-authors, 2019. Importance and vulnerability of the world’s water towers. Nature, 9 Dec. Online. https://doi.org/10.1038/c41586-019-1822-y
4. Huss, M. and Hock, R., 2018. Global-scale hydrological response to future glacier mass loss. Nature Climate Change, 8: 135-140.
5. Borunda, A., 2019. The world’s supply offers water in trouble as mountain ice vanishes. National Geographic, December. Online. www.nationalgeographic.com/science/2019/12/water…