Think about the different ways that people use the wind. You can use it to fly a kite or to sail a boat. Wind is one of our cleanest and richest power sources, as well as one of the oldest. Evidence shows that windmills(风车) began to be used in ancient Iran back in the 7th century BC. They were first introduced to Europe during the 1100s, when armies returned from the Middle East with knowledge of using wind power.

    For many centuries, people used windmills to grind(磨碎) wheat into flour or pump water from deep underground. When electricity was discovered in the late 1800s, people living in remote(偏远的) areas began to use them to produce electricity. This allowed them to have electric lights and radio. However, by the 1940s when electricity was available(可利用的) to people in almost all areas of the United States, windmills were seldom used.

    During the 1970s, people started becoming concerned about the pollution that is created when coal and gas are burned to produce electricity. People also realized that the supply of coal and gas would not last forever. Then, wind was rediscovered, though it means higher costs. Today, there is a global movement to supply more and more of our electricity through the use of wind.

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    On Monday, the Centers for Disease Control and Prevention predicted that 42% of Americans could be overweight by 2030. Our expanding waistlines lead to not only a medical problem, but according to a recent article In The New York Times, it could also endanger personal safety in some situations—in an airplane crash, for example.

    The New York Times' Christen Negroni reports that engineers and scientists are questioning whether airplane seats are adequately constructed to protect overweight travelers. Government standards for airplane seat strength（强度）— first set moe than 60 years ago — require that the seats be made for a passenger weighing 170 pounds (77kg). Today, the average American man weighs nearly 194 pounds (88kg) and the average woman 165 pounds (75kg). Negroni reports:

    “If a heavier person completely fills seat, the seat is not likely to behave as intended during a crash,” said Robert Salazar, the leading scientist at the Center for Applied Biomechanics at the University of Virginia. “The energy absorption that is built into the aircraft seat is likely to be overpowered and the passengers will not be protected properly.”

    “Nor would the injury be limited to that passenger only,” Dr. Salzar said. “If a seat or a seat belt fails,” he said, “those people who are seated nearby could be endangered from ‘the uncontrolled movements of the passenger'.”

    Most complaints about airplane seats focus on their lack of comfort and high ticket price, and whether overweight passengers should be made to buy two seats. But The New York Times' article brings up another reason to feel anxious about flying. Investigators of the issue got in touch with the airplane seat and seat belt makers, but they refused to comment on the problem. Experts agreed that crash testing should be done with overweight dummies （人体模型）. Both airplane seats and seat belts should be tested, they said.

    Fortunately, however, according to Nora Marshall, a senior adviser at the National Transportation Safety Board, the board's investigators have never seen an accident involving a commercial plane in which the weight of a passenger was a problem.

    The First Rule of Finance is to live within your means by spending no more than 80% of your take-home pay．If you take home $ 100 per week, spend no more than $80．

    But ever look at what people spend their money on? I have relatives and friends deeply in debt, spending $ 12 for every $ 10 they earn instead of the $ 8 you know they should be spending．When I see them, they're proud of their new whatever．"What do you think of my new truck?" asked one from the driver's seat．"Do you like my new shoes?" asked another on high heels．"Check out my new big screen．" said a third while holding the remote in his living room．We've all heard people fishing for compliments on their new toys ．

    Every one of them was proud of what they'd financed．They seem to have bought it for the purpose of being proud, of showing off, of keeping up with the Joneses．"Look at my new …?"is everybody's favorite phrase, even when the object in question isn't theirs at all and won't be new when they've finally paid for it, if they ever do．

    They're proud of being stupid．They think it's cool to drive the financed car, wear the financed shoes, and watch the financed TV, but to smart people, whose opinions are the only ones we should respect, these people look dumb as rocks．

    The Joneses, nine times out of 10, are financially stupid．That's why they have all that stuff on borrowed money．Why try to copy them? Worse, why try to impress them? Copy and impress smart people, the ones who own their stuff．If you want to impress smart people, debt is the last way to go about it．Trying to impress a money-smart person by going into debt is like trying to impress Olympic swimming champion Michael Phelps by drowning in a pool．Michael Phelps is impressed by good swimming and a money-smart person by good money management．

    When you're a parent to a young child, you spend a lot of time talking about feelings: about having to share, about being disappointed because you may not have a cookie instead of broccoli (绿花椰菜), about the great injustice of a parent pressing the elevator button before the child has a chance to.

    And in a parenting culture that's increasingly concerned with centering children's needs above all else, mothers and fathers have become skillful at talking about their kids' feelings while masking their own. But new research suggests that parents who hide their negative emotions are doing their children, and themselves harm.

    A study published this month says that when parents put on a faux­happy (假开心) face for their kids,  they do damage to their own sense of wellbeing and authenticity.

"For the average parent the findings suggest when they attempt to hide their negative emotion expression and overexpress their positive emotions with their children, it actually comes at a cost: doing so may lead parents to feel worse themselves," researcher Dr. Emily Impett, says.

    It makes sense that parents often fall back on amping up (扩大) the positivity for the sake of their children — there are a lot of things in the world we want to protect our kids from. But children are often smarter than we expect and are quite in tune with what the people closest to them — their parents — are feeling.

    There was a time about a year or so ago, for example, when I received some bad news over the phone; I was home with my four­year­old and so I did my best to put on a brave face.  She knew immediately something was wrong though, and was confused.

    When I finally let a few tears out and explained that Mom heard something sad about a friend, she was, of course, just fine. My daughter patted my shoulder, gave me a hug, and went back to playing. She felt better that she was able to help me, and the moment made a lot more sense to her emotionally than a smiling mom holding back sobs. I was glad that I could feel sad momentarily and not have to work hard to hide that.

    Relaying positive feelings to your children when you don't feel them is a move the researchers called high cost — that it may seem like the most beneficial to your child at the time but that parents should find other ways of communicating emotions that "allow them to feel true to themselves".

    But this is also about children seeing the world in a more honest way. While we will want to protect our children from things that aren't age­appropriate or harmful, it's better to raise a generation of kids who understand that moms and dads are people too.

    A growing number of Chinese tourists are helping to save a dying town, after a like-known tourist attraction was featured on a number of Chinese travel blogs.

    The residents of Sea Lake, a town of just 600 people, barely see travelers stop at their gas station while driving by, but the sudden influx of Chinese tourists is helping keep the town's economy alive.

    The tourists come to see Lake Tyrrel—a shallow, salt crusted and often dry lake just out of town. According to a local teacher, Rachel Pearce, the extremely beautiful nightscape combined with the mysterious appearance of stars reflected on the salt lake gives people the impression of walking among the stars. Besides, the town is so far away that no light pollution ruins the particularly attractive views, and as it is situated in a barren(寸草不生的), dry part of the country, there are rarely any clouds to spoil the night sky.

    The attraction's growing sought-after status has resulted in the town's motel rooms being full almost every night, and while local farmers are suffering in a two-year drought, tourism is keeping the town's agricultural-based economy stable.

    Despite the popularity of the town and its attraction, locals are still confused as to why their little town deserves so much attention. Sea Lake's population has fallen from around 1, 200a decade ago to 600 today. "We're still unsure why Lake Tyrrel is such a big, big tourist attraction," one local says. "It's quite a shock."

    Just what is a tiger mother？Amy Chua is a law professor at America's Yale University and her recent book on the subject is making waves. She's been called "dangerous", "outrageous", even a "monster" for her descriptions of how she brought up her two daughters.

    Her book Battle Hymn of the Tiger Mother describes fighting with a daughter for hours at the piano to ensure the child gets a piece of music right. She rejected birthday cards made for her by her girls because she didn't think they had made enough effort. She compared one child negatively with the other, threatening to burn their toys. Her rules include：schoolwork always comes first; an A ­ minus is a bad grade; children must be two years ahead of their classmates in math, and playing the violin or the piano is a must.

    Ms. Chua considers the Chinese hard work ethic(道德) as a way of creating happy, successful children—at least in her case. Although she's had a large amount of flak for her theories, one thing can't be ignored—the success of Chinese children in the education system.

    In Britain, shocking research shows that Chinese girls, for example, are outperforming all other foreign groups at GCSE—79 percent getting 5 A ­ C Grades, compared with 58 percent of white British girls. So what is it about Chinese parenting that's leading to high achievers？And how do Amy Chua's theories play into that success?

    She told me that if her daughter came back from school with 96/100 in a test, Chua would ask her what happened to the other 4 points. It's about always knowing "you can do better", she told me.

    Interestingly, in China, the birthplace of the tiger mother, people are moving away from traditional Chinese parenting. They are following more western parenting styles.