The amount of rainfall a place gets isn’t the only factor in how much water is available to it. These major urban areas show how dire the coming global freshwater shortage could get.
Seen from space, this planet is a blue marble, a world where the surface is dominated by water. The Pacific Ocean alone is nearly half of the surface area of our planet. Add in polar ice caps and the rivers and lakes, we can see that water profoundly impacts Earth. Yet most of that water is salt water (97%) and two-thirds of our non-salty water locked away in ice sheets (2% of the global water). Everything else, rivers, lakes, marshes, aquifers, and reservoirs represent that remaining 1% of the Earth’s water supply–and that 1% of water is what sustains human settlements and allows for agricultural expansion. The geography of this 1% is highly uneven and a huge water crisis can cause governments crumble–the fact that this precious resources has been wasted and polluted becomes more frustrating as water resources are being strained in so many places. In this article, it describes 8 major metro areas where water is being depleted rapidly — Tokyo, Miami, London, Cairo, Sao Paulo, Beijing, Bangalore and Mexico City.