1 . French officials are preparing to offer flying taxi services to people attending the Paris Summer Olympics in 2024. If the taxis are actually used in the French capital, it could mark the first major real world show of the flying technology.

Some air taxi developers attended the recent Paris Air Show to show off their products and seek industry support. One of the companies in attendance was Germany’s Volocopter, which plans to offer a flying taxi service during the Olympics.

But so far, no air taxi maker has received government permission to launch service in France. Volocopter hopes to be the first. But the company still needs to run its aircraft through rigorous weather tests and provide thousands of pages of documentation to the European Union Aviation Safety Agency.

Company chief Dirk Hoke said that in addition to worries about government approvals, air taxi companies have also faced difficulties linked to economic slowdowns affecting the world. Robin Riedel, who co-leads the Center for Future Mobility at the business advisory company McKinsey, said companies formed to support air taxi projects have lost about 30 percent of their value in recent years. In addition, many investors(投资人) have decided to put money into drones(无人机) instead of flying taxis.

Hoke has thought about a person he would like to be the first rider of his flying taxis-French President Emmanuel Macron. “That would be super amazing,”Hoke said, “That would be a strong sign to Europe to see the president flying.”

In the beginning, air taxi trips are likely to be short and costly. This is because current battery technology limits the distance and number of paying passengers the aircraft can carry. The long-term success of air taxis will also be dependent on effective systems to manage all the air traffic using the skies. Experts say such systems will need new technology to provide safety for all flyers. As the industry progresses, the number of air taxis is expected to reach into the millions.

5 . Twenty-four trains, nine countries, 13,500 miles. They are the numbers behind the heroic round trip one man took from Southampton in the UK to eastern China.

Roger Tyers, 37, used over $2,500, which was almost twice more than the cost of a return flight, to travel to the Chinese port city Ningbo for academic research in May, 2019. The man spent a month on board 15 trains during the first leg of his round trip. It was the climate crisis, not a love of trains, that drove the sociologist to choose this complicated route over a return flight. He stopped flying when UN climate experts warned that the world had less than 11 years to avoid terrible levels of global warming. Tyers calculated that his train journey to China produced almost 90% less emissions than a return flight.

Tyers is not the only person to avoid air travel in response to climate change. Thousands of people worldwide have publicly promised to stop flying. Activist Maja Rosen launched the “Flight Free” campaign in Sweden with the goal of encouraging 100,000 people not to fly for one year. Although only around 14,000 people signed the online “# flightfree2019” pledge (保证), Rosen, who stopped flying 12 years ago, says that the campaign has made more people worry about the climate crisis and aware of harm of travel by air and motivated them to try new ways of travelling.

According to a survey released in May 2019 by Swedish Railways, 37% of respondents chose to travel by train instead of by plane where possible, compared to 20% at the start of 2018. A spokesperson said: “Rail travel has been boosted due to the worries.” Domestic passenger numbers in July fell by 12% compared to the previous year, according to Swedavia, a company which operates Sweden’s 10 busiest airports.

“The collective pledge helps fight the sense of hopelessness many people feel when it comes to tackling climate change,” Rosen said. “One of the problems is that people feel there’s no point in what you do as an individual. The campaign is about making people aware that if we do this together, we can actually bring changes.”

6 . The noise produced by busy roads is a growing problem.

Already, researchers in the Netherlands are working to develop techniques for silencing the roads. In the next five years the Dutch government aims to reduce noise levels from the country’s road surfaces by six decibels overall. Dutch mechanical engineer Ard Kuijpers has come up with one of the most promising and novel ideas. He set out to address the three most important factors: surface texture (质地), hardness and the ability to absorb sound.

The rougher the surface, the more likely it is that a tyre will vibrate (颤动) and create noise. Road builders usually get rid of bumps on freshly laid asphalt (柏油) with heavy rollers, but Kuijpers has developed a method of road building that he thinks can create the ultimate quiet road. His secret is a special mould (模具) 3 metres wide and 50 metres long. Hot asphalt, mixed with small stones, is spread into the mould by a rail-mounted machine which flattens the asphalt mix with a roller. When it sets, the 10-millimetre-thick sheet has a surface smoother than anything that can be achieved by conventional methods.

To better the performance of his road surface—to make it hard wearing yet soft enough to remove vibrations—he then adds another layer below the asphalt. This consists of a 30-millimetre-thick layer of rubber, mixed with stones which are larger than those in the layer above. “It’s like a giant mouse mat, making the road softer,” says Kuijpers.

The foundation itself uses an even more sophisticated technique to reduce noise further. It consists of a sound-absorbing concrete base containing flask-shaped slots (瓶型狭槽) up to 10 millimetres wide and 30 millimetres deep that are open at the top and sealed at the lower end. When sound waves of specific frequencies enter the top of a flask, they set up resonances (共鸣) inside and the energy of the sound dissipates (消散) into the concrete as heat.

Kuijpers believes he can cut noise by five decibels compared to the quietest of today’s roads. The success of Kuijpers’ design will depend on how much it eventually costs. But for those affected by traffic noise there is hope of quieter times ahead.

7 . On a tram smoothly pulling into the heart of Luxembourg City, Marck gives a smile and takes a look at the fabric of the seat next to him. For him, the city’s trams are more than just transport. More even than the focus of his job. They are about transforming his country and, perhaps, changing the world.

Marck is the director general of Luxtram, Luxembourg’s modern trams. It first started running services two years ago. Next year, Luxembourg will become the world’s only country to get rid of fares on all its forms of public transport. Luxembourg’s traffic problems come from its army of workers. The population of the capital city almost doubles during the working day, when more than 110,000 people travel in and out.

After three decades when its roads have become so crowded, Luxembourg is going to do something remarkable. Free fares, and a plan to persuade people to switch from cars to trams or trains. Marck, along with many others, is excited to see what happens next. “The fact that this is free means that everyone can use it — young or old, rich or poor,” he said. “Everyone can say to themselves it’s better to leave the car at home. We must continue to improve and extend the network. It must always be comfortable, well-connected, efficient.”

Lydie Polfer, the city’s mayor, says she hopes to reach the point where more than a third of people come into the city using public transport — at the moment, it’s less than one in five. She said, “It’s not practical to ban cars because some people, like the elderly, need them. But everyone has to be aware that he or she can do something to improve the situation. There is an expression in German — you are not in the traffic jam — you are the traffic jam, and that is true. I think that making it free will be the biggest arguments for people to use public transport. ”

8 . Fifteen months after operation began, the China-Laos Railway (Laos section) is set to introduce the LCR Ticket App on Wednesday, which allows passengers to make ticket purchases via their mobile phones, bringing Laos into the era of online train ticket sales.

The system, developed by a branch of China State Railway Group, marks a further step in the informatization process of the China-Laos Railway passenger business, according to a press release sent to the Global Times by the China State Railway Group on Tuesday. Since the start of operation on December 3,2021,the China-Laos Railway (Laos section) has seen strong demand, with the daily passenger traffic exceeding 10,000 on most busy days. However, the train tickets are sold manually at windows and sales outlets.

The app, which has the advanced technology of China’s 12306 online ticketing system, is based on the laws and regulations of Laos, its cultural characteristics and user preferences. It also supports Lao, Chinese and English. Due to the size of its population and its advanced and extensive railway system, China is home to the world’s most complex online ticket selling system. During the Spring Festival period this year, the system was able to handle a peak transaction volume of over 1,000 tickets per second. Tickets can be paid for via several methods including VISA, UnionPay, WeChat Payment and Alipay. A manager at Laos-China Railway Company, which operates the Laos section, said that online ticket sales will greatly improve the travel experience on the railway which helps promote tourism. The LCR Ticket App is set to be available for downloading from 6:30 am on Wednesday in Laos. Growing passenger and cargo volume has meant that the China-Laos Railway has become a promising route for international logistics.

Lao Ambassador to China Khamphao Ernthavanh said in a recent interview that the China-Laos Railway is an important project featuring win-win cooperation between the two countries, opening up new prospects for the socio-economic development of Laos and turning the dreams of people along the route into reality. The railway has turned land-locked Laos into a land-linked hub with freight train service bringing goods to countries including Laos, Thailand, Myanmar, Malaysia, Cambodia, Vietnam, Bangladesh and Singapore.