There's so much water, how can there be a shortage?
[The simple model of a water cycle we learned in school outlines rain falling jnto rivers and ebing carried back to the ocean. Most of our existence is between falling and the rivers.]
[Soil, swamps, plants, and beavers slow down watr before heading to the rivers. Concrete repels water directly into drains so that it leaves faster.]
[Water supply will strain when it is disconnected from natural deposits into aquifers. This can happen through sities, coal mining, golf courses, data centres, and industrial practices that pass water through the cycle faster.]