This document discusses global water issues and crises facing major cities. It notes that only 1% of the Earth's water is fresh water for all living creatures to use, and that nature recycles and cleans water through processes like the water cycle, wetlands, and through soil and rocks. Several major cities are then highlighted as facing water stress due to factors like disrupting natural water systems, drought, pollution, climate change, growing populations, and outdated infrastructure. The document concludes by emphasizing the importance of adapting to climate change, protecting water quality, maintaining wetlands and aquifers, fixing leaks, collecting rainwater, reusing grey water, and sustainably managing water resources.