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   If you’ve ever walked through fog (雾), you might have noticed that your skin and hair get wet. This is because fog is made of tiny water drops. Scientists are helping people collect these drops to make drinking water.

In some towns, there is no fresh water. People there have to use trucks to carry fresh water. Itis expensive.

Since rain falls to the ground, it can easily be collected into tanks (水箱). But the water drops that make up fog don’t hit the ground. Instead, they float (漂浮) in the air. To turn fog into water, you have to catch the water drops.

A fog catcher is made of nets with two posts. The nets are usually set up on a hilltop. As fog passes by, the nets catch the water drops. The drops run down the nets and into channels. The channels lead the water into large tanks where it can be stored. A fog catcher can collect 10,000 liters of water a day. Scientists have helped set up fog catchers for towns in Chile, Nepal and Mexico.

Fog catchers are a great way for people in small and lonely towns to have their own fresh water. Centuries before scientists created fog-catching nets, nature was making fog into water on its own. As fog passed through the mountains, large leaves got the drops just like the nets do. People learned to drink the water collected on the leaves. Thanks to modern fog catchers, enough water can be made for a whole town!