The Israeli farmers who pioneered the revolutionary technology known as drip irrigation weren't trying to solve one of the world's most urgent problems．They were just trying to survive．They lived in the desert，and they didn't have enough water to grow their crops．

    In its simplest form, it was little more than a pipe with holes in it. But behind each hole was a hi-tech dripper that let out just the right amount of water. Snaked along a row of crops so that the holes were positioned directly above the roots, the pipe could direct each precious drop of water directly to the plants, getting a bigger harvest while using a very small amount of the water．

    Over time, the farmers improved upon the technology, perfecting the drippers that regulated the flow of water, and connecting the pipelines to computers that could determine exactly how much water each plant needed and when．

    If the global population kept growing, the rest of the world would increasingly resemble their little community in the desert. So they began selling their irrigation systems in other parts of the world，eventually expanding to more than 110 countries. Netafirm, the company says it's lifting people out of poverty and conserving water at a time when the importance of doing so has never been clearer．

    The mass adoption of drip irrigation won't save the world by itself. To avoid the coming catastrophe, nearly everybody will, in some way, have to do more with less, perhaps through accepting and using other new technologies. Otherwise, it's going to get ugly．

C

    Teens and younger children are reading a lot less for fun, according to a Common Sense Media report published Monday.

    While the decline over the past decade is steep for teen readers, some data in the report shows that reading remains a big part of many children's lives, and indicates how parents might help encourage more reading.

    According to the report's key findings, "the proportion (比例) who say they 'hardly ever' read for fun has gone from 8 percent of 13-year-olds and 9 percent of 17-year-olds in 1984 to 22 percent and 27 percent respectively today."

    The report data shows that pleasure reading levels for younger children, ages2-8, remain largely the same. But the amount of time spent in reading each session has declined, from closer to an hour or more to closer to a half hour per session.

    When it comes to technology and reading, the report does little to counsel(建议)parenst looking for data about the effect of e-readers and tablets on reading. It does point out that many parents still limit electronic reading, mainly due to concerns about increased screen time.

    The most hopeful data shared in the report shows clear evidence of parents serving as examples and important guides for their kids when it comes to reading. Data shows that kids and teens who do read frequently, compared to infrequent readers, have more books in the home, more books purchased for them, parents who read more often, and parents who set aside time for them to read.

    As the end of school approaches, and school vacation reading lists loom(逼近)ahead, parents might take this chance to step in and make their own summer reading list and plan a family trip to the library or bookstore.

    In the United States 30 percent of the adult population has a “weight problem”. To many people, the cause is clear: We eat too much. But scientific evidence does little to support this idea. Going back to the America of 1910, we find that people were thinner than today, yet they ate more food. In those days people worked harder physically（体力地）, walked more, used machines much less, and didn't watch television.

    Several modern studies, moreover, have shown that fatter people don't eat more on average（平均）than thinner people. In fact, some investigations, such as a 1970 study of 3,545 London office workers, report that, on balance, fatter people eat less than slimmer people.

    Studies show that slim people are more active than fat people. A study by a research group at Stanford University School of Medicine found the following interesting facts.

    The more the men ran, the greater loss of body fat.

    The more they ran, the greater their increase in food intake（吸收）.

    Thus those who ran the most ate the most, yet lost greatest amount of body fat.

    Safe Travel Abroad

    Preparing to go traveling abroad can be really stressful （有压力的）, especially if you don't know what to expect. Here is a list of important things to remember, so you know exactly what you need to do before you take off.

    What vaccines(疫苗) do I need?

    Go to your doctor for advice as soon as you know you're going traveling. They will know what vaccines you will need and will be able to advise you on when you need to have them. Remember, some vaccines need to be given months ahead, so make sure you book an appointment as early as possible.

    Do I need a visa(签证)?

    It's important that you have the correct official documents for traveling abroad. If you don't have the necessary paperwork, you might be refused entry. You'll need to check that your passport hasn't been out of date either.

    How do I arrange travel insurance(保险)?

    Travel insurance is really important. It can protect you in different kinds of situations, such as if you need medical treatment or if your flights are canceled. Travel insurance can be arranged easily online or over the phone, but you can always turn to your local travel agency. Travel agents will also be able to advise you on what you are insured against.

    The annual World Economic Forum took place in Davos, Switzerland, in Jan. 23-26, 2018. What did Chinese entrepreneurs(企业家)speak in the forum? Are there some quotable quotes for you?

    ★Jack Ma, founder and executive chairman of Alibaba Group

    "I think globalization cannot be stopped — no one can stop globalization, no one can stop trade. If trade stops, the world stops. Trade is the way to dissolve (结束) the war not cause the war," said Ma in Davos, "Google, Facebook, Amazon and Alibaba — we are the luckiest companies of this century. But we have the responsibility to have a good heart, and do something good."

    ★Richard Liu, founder and chief executive officer of JD

    "Business is not only a way to make money but also a way to contribute yourself, to help people," Liu said in a speech in Davos. "How can we face the fractured (分化的) world? That's the topics of the Davos this year. I think a very important thing in business is cooperation. If we can unite, work together, if we work very closely, I think we can bring more hope to the people and we can build more trust between the people, countries and companies and partners," he said.

    ★Jane Sun, CEO of Ctrip

    "Tourism is a sunrise industry. Since I entered Ctrip, every year there are new comers, which, first of all, shows that tourism is booming." Sun told Sina.com in Davos. "We invested heavily in ABC.A refers to AI, B is big data, and C is cloud computing. As we continue to expand overseas, these three will be very good weapons for us. So we think those mean opportunity," she said.

    ★Hu Xiaoming, president of Aliyun

    "In 2018, people will see the development in various countries more closely connected with cloud computing. More manufacturing enterprises and financial institutions will start to use 'cloud', and cloud computing will increase the efficiency of technology and finance," Hu told Xinhua in Davos.

    Families around the country are finding new options for their children's midday meal thanks to a growing number of delivery options catering to students. Kiddos Catering in Chicago adopts a method of providing restaurant meals to schools that contract with it. Owner Michelle Moses and her staff work with area restaurants to create a variety of kid-friendly choices and deliver the meals to the schools five days a week. Parents select the lunches from an online order form that lists the day's featured restaurant and its menu choices.

    "Each day is a different restaurant with six to 10 menu options," she said. "It offers so much choice to kids." The service appeals to parents because they think their children are less likely to toss out restaurant food than a packed lunch, Ms. Moses said. The schools appreciate that Moses handles the ordering, payment, pickup, and food distribution in the cafeteria. "Schools really want to be in the business of educating kids," she said. "They don't want to be in the food and beverage(餐饮) business."

    That doesn't mean that schools always like it when teens (or parents) take it upon themselves to order food through phone apps. Many schools have banned that practice, citing safety concerns about delivery drivers showing up at school unannounced and the burden of tracking down students to alarm them that their meals have arrived.

    "These types of deliveries pose an unnecessary security risk for students and staff," said Bernard Watson, director of community relations for Gwinnett County Public Schools in Suwanee, Ga. "In addition, our award-winning school nutrition program provides students with a wide variety of tasty, nutritious meals on-site, so there is no need to order food from outside."

    Jacob Levin, a recent graduate of Bexley High School in Bexley, Ohio, relied on a sub shop to deliver a sandwich to him during lunchtime meetings or other appointments that conflicted with his lunch period. "It was a convenient option. In most cases, I would not have been able to eat at school if it weren't for the delivery option," he said. "Having a restaurant-quality sub also was much more enjoyable than cafeteria food."