The world uses about a thousand million (百萬) tons of water a day. Water is a human right and everyone should have their share. Yet more than 700 million people around the world have trouble getting clean, safe water.

Treating waste water is a good way to provide fresh water for us. And it also helps the environment by keeping waste out of rivers and oceans. 80% of waste water around the world is not treated at all, and it is running into oceans. But now we have got the technology to treat and reuse the waste water. While 75% of our planet is covered with water, only about 2% is freshwater- that comes from rivers, lakes, ice and snow. The rest, 98% of the water, is in seas and oceans. It is too salty to drink. Then desalination businesses come in. More than 19000 factories have been built around the world, mostly in coastal countries. They process (加工) more than 92 million tons of water every day. But the technology they use requires a lot of energy.

Scientists are working to create a less costly technology. They want to produce 20 times more clean water and make sure everyone has enough. But for now, the world still faces each day with not having enough water for everyone.

1.How many people have trouble in getting clean water around the world?

A.Under 700 million. B.Over 700 million. C.About 92 million.

2.Treating waste water helps the environment by________.

A.storing waste in ice and snow

B.letting waste run into oceans

C.keeping waste out of rivers and oceans

3.What does the underlined word "desalination" in Paragraph 3 mean?

A.遠(yuǎn)洋運(yùn)輸 B.食鹽銷售 C.海水淡化

4.At present, the technology to process water________.

A.needs much energy B.saves much money C.satisfies everyone

5.What can we infer from the last paragraph?

A.Everyone has enough clean water.

B.The water problem is still serious.

C.Our planet is covered with water.

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