You've probably had a drink of water or washed your hands today. But people
use water for so many other purposes, like cleaning stuff, transportation, and generating hydroelectric power. Just as nothing can live without water, not much
can be made without it, from cotton candy to cotton T-shirts.
Because water is so useful, most people live along coastlines, rivers, and lakes. Where fresh water is limited, people have used many technologies—like
wells, dams, and canals—to store and move it.
Sometimes these technologies damage habitats. Other species have to compete with humans for water. This may help explain why so many creatures that
live in fresh water are endangered.
We need to be smarter and more careful about how we use water in order to make sure that there's enough for all life on Earth.