The UK government has announced plans to tackle sources of air pollution, including popular wood-burning stoves, but its Clean Air Strategy, which was unveiled last week, fails to address the real problem.

    Although pollution from woodburning stoves is a relatively new problem for the UK, it has long been a major one in countries such as Canada and New Zealand. And the take-home message from them as to controlling the release of harmful particulates in the air is simple: ban wood burning.

    "There does not seem to be a limit below which there is no impact on health," says Gary Fuller at King's College London, whose team has shown that wood burning is now the source of a third of particulate pollution in UK cities.

    As New Scientist reported last year, families with wood burners are likely to be exposed to the highest levels of pollution and their neighbours are next in the firing line, given that the particulates produced can easily escape from homes. Despite this, the UK government isn't planning a ban. Instead, it wants "to prohibit the sale of the most polluting fuels", such as wet wood. What's more, lots of people with wood burners don't buy wood from shops. Instead, they scrounge it from wherever they can, with building waste one popular source. This is a disaster in pollution terms as treated or painted wood can release highly toxic chemicals when burned. The plan is also to "ensure that only the cleanest stoves are available for sale by 2022". But even the cleanest stove produces eight times as much pollution as a diesel truck, says Fuller.

    Some cities actually required old wood stoves to be replaced with cleaner new ones. That has helped, but wood burning remains a major source of pollution, says Fuller. In most cases, conventional gas central heating plus properly insulating (使隔热) your home is less harmful in global-warming terms than switching to a wood burner.

    Finally, there are separate but related EU laws that set limits on the maximum allowable concentrations of specific pollutants in the air at individual locations. The UK frequently breaches these: London's Oxford Street often hits its annual limit within the first weeks of each year. As a result, the UK government has lost a series of court cases brought by the environmental organization ClientEarth. Separately, on 17 May, the UK and five other countries were referred to the Court of Justice of the European Union for their repeated failures to keep to these limits. If the government really wants to clean up the UK's air, it has a lot more work to do.

    If you've ever visited London, it's likely that you've heard the loud chimes（鸣响）of Big Ben, the 157-year-old clock bell of the UK's Houses of Parliament（议会）.

    But on Aug 21, the world's most famous bell fell silent. This is because the Palace of Westminster's Elizabeth Tower, which houses Big Ben, needs to be repaired. The workers who'll carry out the repairs don't want their ears to be damaged by the sounds of the huge bell, reported BBC News. Big Ben won't ring again regularly until 2021.

    There's been quite an emotional response to the move. Several members of parliament gathered in front of the Houses of Parliament to hear the bell's last regular chime for four years. A few even shed tears, as if they were attending a friend's funeral.

    But a number of politicians are angry about the lengthy silencing of Big Ben, calling it a symbol of Britain, according to ABC News. And some members of public agree with it. "It's our heritage," David Dummigan, from Cumbria in the north of England, told The New York Times. "People come from all over the world to look at it and listen to it. It's part of British history." This kind of emotional reaction could be linked to "fears about Britain losing its voice and place in the world, which is part of the threat that comes from Brexit", according to CNN. "The reality of losing a place at the top table is being made obvious," it wrote.

    Worries aside, fans of Big Ben will still be able to hear its unique chimes during special occasions such as New Year's Eve. But if we do miss hearing Big Ben on a regular basis, we could always set its sound as our message tone.

    Whatever happened to the familiar scene from the past of children playing "tag(捉人游戏)" in the streets while their parents chatted with the neighbors over the garden fence? This picture is fading fast today, as children are now leaving the streets in favor of a screen.

    Several organizations are attempting to change this situation. One of these organizations is Play England, which aims to improve opportunities for children to play outside. A leading figure in the campaign is 50-year-old Adrian Voce, who has childhood memories of days spent in the "Big Woods" near his house with his older brothers. "We were given a packed lunch and told not to talk to strangers. I can still remember wandering in and out of each others' houses." he says.

    However, it is not only the children that Mr. Voce and his organization have to convince. In many cases the parents themselves block his efforts. A survey in 2014 found that 85 percent of adults agreed that it was important for children to be able to play safely in the road or street where they live. However, many of them were not prepared to park their cars an extra 50 meters away from their homes.

    Mr. Voce's attempts to encourage children to play outside include the organization of campaigns like National Playday. Hundreds of communities all over the country take part in this effort, yet it can take a lot of people to give children a taste of what it is like to play in the streets. On one street in Aldershot last year there were five policemen, three community support officers, a traffic management crew, a closed-circuit television van, and a team of "play workers."

    Society today has changed to such an extent that children do not feel safe on the streets and their parents no longer feel comfortable about letting them play there. It is not only the appeal of computers and video games that has driven children inside, but also the presence of traffic, crime, and violent young people. However, thanks to the efforts of people like Adrian Voce, it may not be too late to turn back the clock.

    Thirteen-year-old Kaylee has a lot of friends—532, actually, if you count up both her Instagram followers and Facebook friends. And she spends a lot of time with them.

    But is it possible that Kaylee's online friendships could be making her lonely? That's what some experts believe Connecting online is a great way to stay in touch, they say. However, some experts worry that many kids are so busy connecting online that they might be missing out on true friendships.

    Could this be true? During your parents' childhoods, connecting with friends usually means spending time with them in the flesh. Kids played Scrabble around a table, not Words With Friends on their phones. When friends missed each other, they picked up the telephone. Friends might even write letters to each other.

    Today, most communication takes place online. A typical teen sends 2,000 texts a month and spends more than 44 hours per week in front of a screen. Much of his time is spent on social media platforms like Instagram and Facebook.

    In fact, in many ways, online communication can make friend ships stronger, “There's definitely positive influence. Kids can stay in constant contact, which means they can share more of their feelings with each other,” says Katie, co-author of the App Generation.

    Other experts, however, warn that too much online communication can get in the way of forming deep friendships. “If we are constantly checking in with our virtual worlds, we will have little time for our real world friendships.” says Rosen, a professor at California State University.

    Rosen also worries that today s kids might mistake the “friends” on the social media for true friends in life. However, in tough times, you didn't need someone to like your picture or share your tweet. You needed someone who would keep your secrets and hold your hand. You would like to talk face to face.

    World-famous scientist Stephen Hawking has died at the age of 76. He was often called the most brilliant theoretical physicist since Albert Einstein. But his amazing career actually started as a young man who struggled to get around to doing his homework at Oxford University where he studied physics. He then went on to Cambridge to research cosmology, the study of the origin of universe.

    When he was 21, Hawking's life hit a big hurdle. He was diagnosed with Motor Neurone Disease. The disease causes the brain to stop sending messages to a person's muscles. At the time, doctors said he would only live for around 2 years, but he proved them very, very wrong.

    And with the help of a special wheelchair and speech computer, Hawking spent much of his time researching the beginning of the universe and black holes. His most famous discovery was probably when he demonstrated that black holes emit some radiation, which has since become known as Hawking Radiation. He also spent a lot of time thinking about what existed before the big bang.

    Hawking wrote books that explained his big ideas in ways that could be understood by the average person. In 1988 he published A Brief History of Time. It became really popular and sold more than 10 million copies. However, he wasn't just known for his books. He also had a lot of fun becoming a regular on TV screens around the world. He even had a big Hollywood film made about his life.

    Throughout his life Stephen Hawking inspired people to look beyond our planet and expand our knowledge of the universe. His family says that he'll be greatly missed and the legacy of his amazing ideas will live on.

    Do you have any stress in your daily life and do you know how to reduce your stress?

    Our world is changing with ever increasing speed and many people are finding it difficult to keep up with it. Although no one can control the world at large, people do have the power to control their personal world by controlling stress and their responses (反应) to it.

    Of course a certain amount of stress, both physical and mental is normal and healthy for humans but too much can be fatal. According to a report on the Mayo Clinic's website, "80% of patient visits to their doctors are stress related. Almost 60% of all employee absences from work are related to stress. Over one million people (in the U. S. ) die each year due to diseases related to stress. This includes obesity(肥胖), lung cancer (due to smoking), heart disease and high blood pressure. "

    The result of stress or the way it shows in a person's life is, in part, their reaction to the situation. Some of the ways in which stress "shows up" are signals that need to be recognised, before more serious conditions develop. A few of these are: stomachaches, chest pain, anxiety, depression, low self-esteem (自尊) and impatience.

    The good news is that these reactions can be changed naturally. By using positive suggestions a hypnotist (催眠治疗师) can help us make great changes. A deep, relaxing hypnotic rest is a very safe, pleasant and enjoyable process and stress reduction is a natural by-product.

    If you would like to get the tools to reduce stress naturally, hypnotism can be very helpful. A professional hypnotist not only guides people through stress reducing exercises and offers suggestions for dealing with stress, but also teaches self hypnosis skills which can be used throughout life.