1 . Each week, the BBC Autos editors select their favourite transport-related news stories, features and videos from around the web. This week, we noticed a trend toward offering creative solutions to global transportation problems.     1    .

Carry on without your carry-on

In an effort to save money and increase customer spending, United Airlines will restrict some passengers’ access to overhead compartments. The Huffington Post reports that United will be the first US airline to limit “basic economy” flyers to a single free carry-on bag that can fit under a seat.     2    . In addition, customers buying these low-fare tickets will be unable to accrue airline miles and will be randomly assigned seating the day of the flight.

    3    .   As BBC Autos reported back in October, airlines are struggling with reducing cargo weight. Because heavier bags — and heavier passengers — result in significantly higher fuel bills, airlines such as Samoa Air have implemented a “fat tax” that means overweight passengers have to pay more for a ticket.

Grandad’s Coke pool rust-removal stunt goes wrong

Not only are fizzy drinks(起泡饮料) capable of rotting teeth, they can also remove rust(锈). One Latvian grandfather decided to put cola to the ultimate rust-removal test by submerging his car in a pool of Coca-Cola. In a video posted online, the unnamed daredevil grandad fills a lined pit with 6,000 two-litre bottles of Coke. He then settles into the driver’s seat and speeds into the hole, smashing the front of his red Audi. Whether or not the rust was removed is unknown, but the Daily Mail contends that “    4    ”.

5 . Over this past year, lifestyle blogger Aileen Xu has kept a monthly gratitude list.     1    . And sometimes it was life’s little blessings: “I’m grateful for good hair after I shower.” Xu started making such lists when she was in college. Now, the 28-year-old YouTuber recommends the practice to her nearly 750, 000 subscribers. (订阅者)

It wasn't a hard sell. “I think just over the last few years there's been more of a trend to focus on gratitude,” says psychologist Laurie Santos, who teaches a popular course on the science of happiness at Yale.

You can buy different kinds of gratitude journals, or download apps that remind you to take down your blessings. “Those types of products can remind us to take time to be grateful,” Santos says.

And noting your gratitude seems to pay off.     2    . Studies have found that giving thanks can help people sleep better, lower stress and improve interpersonal relationships. In another study, high school students who were asked to keep gratitude journals also reported healthier eating. There's also some evidence it could lower your risk of heart disease and reduce symptoms of depression for some people.

    3    . “It's one of the practices that really win out (终获成功) from the field of positive psychology,” she says, “because it takes very little time, and the benefits are so powerful.”

Making gratitude lists is just one way of enjoying those benefits. The best way of expressing gratitude may be different for each person. You could choose to keep your gratitude private or share it with others.

However, for all the research on the broad benefits of expressing gratitude, there's also evidence that it isn't for everyone. And it isn't a cure-all. It can't make injustice (不公平), loss or pain disappear.     4    . “The research shows that focusing on the positive can improve our mood more than we expect,” according to Santos.

6 . For the first time in its history, the International Olympic Committee has allowed a team of refugees to compete at the Games. All of the team’s members were forced to leave their home countries. Now they’ve come together to compete under the Olympic flag instead.

Making it to the Olympics is something eighteen-year-old swimmer Yusra has always dreamed of. But just last year, she was swimming for her life. She and her sister were forced to leave their home in Syria because of the war there. They were trying to get to Greece in a rubber dinghy (橡皮艇) with eighteen other refugees, when their boat broke down and began filling with water. Most of the people on board couldn’t swim, so she and her sister jumped in to help push it to shore.

Three hours later, they made it to safety, and eventually to Germany as refugees. Refugees are people who have left their home country because their lives are threatened by war, bad treatment or violence---often because of their race, gender or beliefs. Around the world, more than 60 million people are in this situation. And some of them, like Yusra, are elite athletes who have trained all their lives to compete at the highest level, only to have that chance taken away.

Now, a team of ten, including swimmers, runners, and judokas from Syria, South Sudan, Ethiopia and Congo have been given the chance to compete at the Games under the Olympic flag. They’ve also been given their own coaches, officials, uniforms and a chef, all paid for by the IOC. And in the past few months they’ve been training hard. The IOC says it wants the team to inspire and give hope to other refugees, and draw attention to the issues millions of other around the world are facing. And these guys say they are up to the task whether they win gold or not.

“These refugee athletes will show the world that despite the unimaginable tragedies that they have faced, anyone can contribute to society through their talent, skills and strength of the human spirit,” the statement continues.

7 . Born in the 1950s, shopping malls were once the symbol of the U.S. consumer culture, but many are now dying out.

Dying shopping malls can be found across the United States, often in middle-class suburbs. Economic decline in certain areas together with an upward trend towards online shopping and new forms of urban shopping centers have pushed the once seemingly unbeatable shopping malls into decline. It is estimated that 15 to 50 percent of shopping malls may close in the coming decades.

American shopping culture follows its housing culture. Numerous shopping malls were therefore born after the Second World War, as Americans with cars and fat wallets moved to the suburbs. U.S. shopping malls were built at a rapid pace as shoppers fled cities, peaking in the mid-1990s when they were being built at a rate of 140 a year. Thus, too many shopping malls are left though construction has gradually decreased since then.

Currently, there are around 1,500 shopping malls across the U.S. Most share a handful of similar feature. They usually contain two or three stories of stores separated by walkways. Food courts serve pizza and other fast food. Parking lots are big enough to easily misplace a car.

Shopping malls in Europe might contain grocery stores or childcare centers, while those in Japan are often built around mass transit (交通枢纽). But the suburban American shopping malls are hard to get to and mainly sell clothes and gifts.

As many shopping malls became redundant (过剩的), leaders in many U.S. towns who once fought for malls now struggle with how to transform them to new uses. Highland Mall in Texas is being transformed into a community college campus, and Lakeland Mall in Florida now houses a megachurch (大型教会). Others have been redeveloped to include housing, offices and even green space. However, it is hard to imagine every shopping mall meeting the demands for such transformations.

My wife and I recently welcomed a child into the world．His only interest right now is keeping us awake 24/7．But one day，he'll need to learn something about finance．When he does，here are some suggestions．

1. You might think you want an expensive car，a fancy watch，and a huge house．But you don't．     1     You think having expensive stuff will bring it．It almost never does-especially from the people you want to respect and admire you．

2. I hope you're poor at some point．Not struggling，and not unhappy，of course．But there's no way to learn the value of money without feeling the power of its scarcity．It teaches you the difference between necessary and desirable．     2     These are essential survival skills．

3. Don't stay in a job you hate because you made a career choice at 18．Almost no one knows what he or she wants to do at that age．Many people don't know what they want until they're twice that age．（These are the signs you're in the wrong career．）

4. The best thing money buys is to control over your time．     3     One day you'll realize that this freedom is one of the things that makes you truly happy．

5. Your savings rate has a little to do with how much you earn and a lot to do with how much you spend．I know a dentist who lives paycheck to paycheck，always on the edge of ruin．I know another person who never earned more than 50，000and saved a fortune．The difference is entirely due to their spending．     4    ．

6. Don't listen to me if you disagree with what I've written．The world you grow up in will have different values and opportunities than the one I did．More important，you'll learn best when you disagree with someone and then are forced to learn it yourself．（On the other hand，always listen to your mother．）

9 . The largest genetic study of mosquitoes has found their ability to resist insecticides(杀虫剂) is evolving rapidly and spreading across Africa, putting millions of people at higher risk of contracting malaria（疟疾）.

British scientists who led the work said mosquitoes’ growing resistance to control tools such as insecticide-treated bed nets and insecticide spraying, which have helped cut malaria cases since 2000, now threatens “to disturb malaria control” in Africa.

“Our study highlights the severe challenges facing public efforts to control mosquitoes and tomanage and limit insecticide resistance,” said Martin Donnelly of the Liverpool School of Tropical Medicine, who worked on the study with a team from Britain’s Wellcome Trust Sanger Institute.

Latest World Health Organization (WHO) data show that 216 million people were infected last year with the malaria parasite（寄生虫）, which is transmitted by blood-sucking Anopheles mosquitoes. The disease killed 445,000 people in 2016, and the majority of them were children in sub-Saharan Africa.

To understand how mosquitoes are evolving, the researchers sequenced the DNA of 765 wild Anopheles mosquitoes taken from 15 locations across eight African countries. Their work, published in the journal Nature on Wednesday, created the largest data resource on natural genetic variation for any species of insect.

Analyzing the data, the scientists found that the Anopheles gamblae mosquitoes（冈比亚疟蚊）were extremely genetically diverse compared with most other animal species. This high genetic diversity enables rapid evolution, they said, and helps to explain how mosquitoes develop insecticide resistance so quickly.

The data also showed the rapid evolution of insecticide resistance appeared to be due to many previously unknown genetic variants（变体）within certain genes. The scientists said these genetic variants for insecticide resistance were not only emerging independently in different parts of Africa, but were also being spread across the continent by mosquito migration.

Michael Chew, an expert at Britain’s Wellcome Trust global health charity which helped fund the research, said the finds underlined the importance of pushing scientific research ahead to control malaria.

Global efforts to control malaria through effective vaccine, insecticides and the best drug combinations require urgent, united action by scientists, drug companies, governments and the WHO.

10 . The American Craftsman style is a type of design. It was popular from 1900 to the 1930s. It changed the style of building in the United States.

The craftsman style originally began in Europe. The British Arts and Crafts style arose in the 1860s. The unique designs of this movement tried to offer dignity to the common person. Handmade items were preferred because they were thought better than items that were mass-produced. But this British style was still Victorian. It still only served the wealthiest clients.

In 1897 a group of Boston architects brought these handcrafted styles to American. They planned a show of craft objects, which turned out to be a huge success. Here they realized the potential and established the Society of Arts and Crafts on June 28, 1897. Its slogan was “to develop and encourage higher standards in the handicrafts.”

The American style began as the Victorian Era was ending. It emphasized handmade work. Originality and simplicity were highly valued. Local materials and the quality of the handicraft were very important. these traits were meant to dignify the modest homes of the middle class.

These simple designs used glass and wood that were produced locally. They were also very elegant. The metalwork was a reaction to Victorian Opulence. The increase of mass-produced housing items was rejected. The American Craftsman used clean lines. It also relied on sturdy structure. Natural materials were always used in these houses if possible.

This style introduced many changes to the average American home. New designs were made for families without servants. This was a trait of the new middle class. The kitchen went form being a hidden room to a prominent one. Another development was the breakfast nook. This new area provided the family with a place to gather at any time of day.

Also, inspirational to the Craftsman style were the Shaker and Mission designs. The American Craftsman style led to the Art Deco Movement of the 1930s.