The Pacific island nation of Nauru used to be a beautiful place. Now it is an ecological disaster area. Nauru's heartbreaking story could have one good consequence — other countries might learn from its mistakes.

    For thousands of years, Polynesian people lived the remote island of Nauru, far from western civilization. The first European to arrive was John Fearn in 1798. He was the British captain of the Hunter, a whaling ship. He called the island Pleasant Island.

    However, because it was very remote, Nauru had little communication with Europeans at first. The whaling ships and other traders began to visit, bringing guns and alcohol. These elements destroyed the social balance of the twelve family groups on the island. A ten-year civil war started, which reduced the population from 1,400 to 900.

    Nauru's real troubles began in 1899 when a British mining company discovered phosphate (磷酸盐)on the island. In fact, it found that the island of Nauru was nearly all phosphate, which a very important fertilizer for farming. The company began mining the phosphate.

    A phosphate mine is not a hole in the ground; it is a strip mine. When a company strip-mines, it removes the top layer of soil. Then it takes away the material it wants. Strip mining totally destroys the land. Gradually, the lovely island of Nauru started to look like the moon.

    In 1968, Nauru became one of the richest countries in the world. Every year the government received millions and millions of dollars for its phosphate.

    Unfortunately, the leaders invested the money unwisely and lost millions of dollars. In addition, they used millions more dollars for personal expenses. Soon people realized that they had a terrible problem — their phosphate was running out. Ninety percent of their island was destroyed and they had nothing. By 2000, Nauru was financially ruined. Experts say that it would take approximately $433,600,000 and more than 20 years to repair the island. This will probably never happen.

    For Pei Shiyou, this year's Lunar New year's Eve was among the few he ha spent with his extended family.

“It's one of the benefits of starting a business in my hometown,” said Pei, who was born and raised in Hefei, Anhui province, and will soon turn 60. His wish for the Year of the Dog is to see smart glass— the product his team has been developing since 2016—go into production.

    Starting a business with a creative research team and receiving government support have given him a strong sense of pride, a feeling he says he often lacked during his 25 years working in the United States, he said.

    He was among Chinas first students to travel to the US for postgraduate stud. After that, he landed his first job at Amoco Corp and later moved to California eventually becoming head of product research and development at KLA-Tencor, a global capital equipment company in Silicon Valley. Yet Pei said he still felt unfulfilled and unsatisfied.

    “It seemed there was an invisible ceiling for me when I pursued my career in the US. I felt like it was unlikely for me to achieve any higher sense of achievement or recognition.”

    He returned to China in 2017, and nine years later established a smart-glass company in Hefei with two other US-trained engineers.

    The company's product is suitable for low-temperature, flexible smart-film manufacturing and is able to self-adjust its level of transparency based on temperature changes and sunlight conditions, according to Pei, who said it has the potential to reduce the need for air conditioning and make curtains abandoned.

    Between 2007 and 2016, Pei lived and worked in several Chinese cities. “What attracts me to Hefei is that it is easy to gather tech talents here due to the city's rapid development in recent years, and also because it has several universities,” he said. Support from the local government has been one of the best attractions that convinced Pei to locate his company in the eastern Chinese city.

    In January last year, Hefei was approved as the site of a national-level science center, the second of its kind after an earlier one was built in Shanghai. The center, now under construction, will focus on areas including information technology, energy and health.

    Metro Pocket Guide

    Metrorail(地铁)

    Each passenger needs a fare card to enter and go out. Up to two children under age five may travel free with a paying customer.

    Fare card machine are in every station. Bring small bills because there are no change machines in the station and fare card machine only provide up to $ 5 in change.

    Get one of unlimited Metrorail rides with a One Day Pass. Buy it from a fare card machine in Metro stations. Use it after 9:30 a.m. until closing on weekdays, and all day on weekends and holidays.

    Hours of Service

Open: 5 a.m. Mon—Fri.    7a.m. Sat—Sun.

Close: midnight Sun—Thur.    3a.m. Fri—Sat. nights

    Last train time vary. To avoid missing the last train, please check the last train time posted in the station.

    Metrobus

    When paying with exact change, the fare is $ 1.35. When paying with a smatTrip@CARD the fare is $1.25

    Fares for the Senior /disabled（老年/残疾）customers

    Senior customers 65 and older and disabled customers may spend less money on their ride. On Metrorail and Metrobus, use a senior/disabled fare card or SmarTrip@card. For more information about buying senior/ disabled fare cards, or SmarTrip@ cards and passes, please visit MetroOpenDoors.com or call 202-637-7000 and 202-637-8000.

    Senior citizens and disabled customers can get free guide on how to use proper Metrobus and Metrorail services by calling 202-962-1100

    Travel tips

    Avoid riding during weekday rush periods –before 9:30 a.m. and between 4 and 6 p.m.

    If you lose something on a bus or train or in a station, please call Lost & Found at 202-962-1195.

    Life for almost anyone is increasingly influenced by screens. Not only are screens themselves cheap to make, but they also make things cheaper. Any place that can fit a screen in can cut costs. And any activity that can happen on a screen becomes cheaper. The physical experience of learning, living and dying is becoming smooth glass. All of this has led to a curious new reality: Human contact is becoming a luxury good (奢侈品).

    "What we are seeing now is the luxury of human engagement," Milton Pedraza, the chief of the

    Luxury Institute, said. Expected spending on experiences such as enjoyable travel and dining is outpacing spending on goods, according to his company's research, and he sees it as a direct response to the rapid increase of screens.

    Screens exposure starts young. And children who spent more than two hours a day looking at screen got lower scores on thinking and language tests, according to early results of a landmark study supported by the National Institutes of Health. The study focuses on brain development of more than 11,000 children. Most disturbingly, the study is finding that the brains of children who spend much time on screens are different. For some kids, their cerebral cortex (大脑皮层) would become thinner before expected time. In adults, one study found an association between screen time and depression.

    There is also the reality that in our culture of increasing separation, in which so many of the traditional gathering places and social structures have disappeared, screens are filling a vital gap.

    For normal people, running away from the screen becomes impossible. It's not a luxury, and it's easy to get. It is normal for more people to need the network constantly. In addition, it has become an important part of social interaction.

This summer has brought ex treme heat and droughts to places around the world. The droughts are leading to serious problems and the effects of the droughts are likely to be felt for years. Droughts aren't new, but Earth's rising temperatures because of global warming are making them much harder to avoid. The drought in the Horn of Africa may be the most serious situation. For several years, the area has had very little rain during the rainy seasons. The dry conditions have killed millions of farm animals and destroyed the crops of farmers.

The drought is causing energy problems in Europe, too. The low water levels have cut the amount of hydroelectric power that can be produced. Some rivers are so low that the heavy boats that carry coal can't travel on them.

Farmers in California and Arizona have been hit particularly hard. California has put limits on water use across the state. Now water is being limited in other places. When there are water limits, farmers aren't able to grow as many crops. That can drive up food prices, and that affects everyone.

China is facing similar problems. The drought has dried up much of the water in the Yangtze River. That has cut the amount of energy produced by the world's largest da m by 40%. China hasn't been able to produce enough energy, since millions of people are using electricity to keep cool. The government is calling on the public to turn off the air conditioner when it is not too hot. The country is trying to make it rain by shooting chemicals into clouds. But this is an uncertain and temporary response.

There are no easy solutions to any of these droughts. It took years to create the climate crisis, and it will take a long time to get it under control. For now, governments and people will need to care fully manage water supplies and other resources to limit the damage as much as possible.

Following Zibo and Harbin, Tianshui, an ancient silk Road city in Northwest China's Gansu Province, became the latest place that has caused {#blank#}1{#/blank#} nationwide craze thanks to its malatang, or spicy hot pot. Tianshii spicy hot pot {#blank#}2{#/blank#}（make） by cooking raw ingredients（原料） —meats, vegetables and noodles, in a pot of boiling broth. Then they are rolled into a large steel basin, drizzled with garlic sauce, sprinkled with Tianshui peppercorns and crushed peanuts, {#blank#}3{#/blank#}（brush） with bright red chili oil, and colored with coriander and green onions. Fragrant and {#blank#}4{#/blank#}（visual） appealing, it provokes（刺激） taste buds on the tip of tourists' tongue. Different {#blank#}5{#/blank#} Sichuan cuisine, the secrets to the unique flavor and attractive appearance of Tianshui malatang come from local speciality ingredients in Tianshui—Gangu chili peppers and Maiji peppercorns, both {#blank#}6{#/blank#}（belong）to local speciality agricultural industries. Unlike the peppers used throughout Sichuan, the Tianshui pepper is fragrant and juicy. It {#blank#}7{#/blank#}（burn） in the mouth but is smooth in the stomach.

Tianshui not only has delicious spicy hot po t food, but also stands out for its distinctive {#blank#}8{#/blank#}（region）culture. Its grottoes and murals（石窟与壁画） are among the most famous art {#blank#}9{#/blank#}（form） in Gansu. The Maijishan Grottoes, {#blank#}10{#/blank#} are home to 221caves and more than 1,000 square meters of ancient murals, are known for their impressive beauty.