In ancient Egypt, a shopkeeper discovered that he could attract customers to his shop simply by making changes to its environment. Modern businesses have been following his lead,with more tactics（策略）.

One tactic involves where to display the goods. Foe example, stores place fruits and vegetables in the first section. They know that customers who buy the healthy food first will feel happy so that they will buy more junk food（垃圾食品）later in their trip. In department stores, section is generally next to the women's cosmetics(化妆品) section：while the shop assistant is going back to find the right size shoe, bored customers are likely to wander over cosmetics they might want to try later.

Besides, businesses seek to appeal to customers' senses. Stores notice that the smell of baked goods encourages shopping, they make their own bread each morning and then fan the bread smell into the store throughout the day. Music sells goods, too. Researchers in Britain found that when French music was played, sales of French wine went up.

           When it comes to the selling of houses, businesses also use highly rewarding tactics. They find that customers make decision in the first few second upon walking in the door, and turn it into a business opportunity. A California builder designed the structure of its houses smartly. When entering the house, the customer would see the Pacific Ocean through the windows, and then the poll through an open stairway leading to the lower level. The instant view of water on both levels helped sell these $10 million houses.

    The behaviour of a building's users may be at least as important as its design when it comes to energy use, according to new research from the UK Energy Research Centre (UKERC). The UK promises to reduce its carbon emissions (排放）by 80 percent by 2050, part of which will be achieved by all new homes being zero-carbon by 2016. But this report shows that sustainable building design on its own — though extremely important- is not enough to achieve such reductions: the behaviour of the people using the building has to change too.

    The study suggests that the ways that people use and live in their homes have been largely ignored by existing efforts to improve energy efficiency (效率)，whichinstead focus on architectural and technological developments.

     ‘Technology is going to assist but it is not going to do everything,'explains Katy Janda, a UKERC senior researcher，‘consumption patterns of building users can defeat the most careful design. 'In other words，old habits die hard, even in the best-designed eco-home.

    Another part of the problem is information. Households and bill-payers don't have the knowledge they need to change their energy-use habits. Without specific information，it's hard to estimate the costs and benefits of making different choices. Feedback (反馈） facilities, like smart meters and energy monitors，could help bridge this information gap by helping people see how changing their behaviour directly affects their energy use; some studies have shown that households can achieve up to 15 percent energy savings using smart meters.

    Social science research has added a further dimension (方面），suggesting that individuals'behaviour in the home can be personal and cannot be predicted 一 whether people throw open their windows rather than turn down the thermostat (恒温器) , for example. Janda argues that education is the key. She calls for a focused programme to teach people about buildings and their own behaviour in them.

    No matter where you live or how you define yourself, these are some of the best activities to get in touch with nature.

Hiking

    One of the easiest and most accessible ways to get close to nature is by setting out on a good old hike. Hiking generally doesn't require any special equipment or special skills; just a good pair of boots, a map, and a thirst for adventure. This activity can be as relaxing as you make it. Suggestion: consider doing a little advance research on Trails.com or EveryTrail.com.

    Backcountry Camping

    Why limit yourself to just a day hike when you can have a full weekend (or longer) adventure? Backcountry camping involves packing your tent, sleeping bag, food，and water on your back to set up camp in a remote location. If you're an experienced hiker and camper, this is an excellent way to test your survival skills and explore the wildness. Many parks require backpackers to obtain permits, so make sure to register and map your route before stepping on the trail.

    Mountain and Road Biking

    Unlike long hikes through the woods, biking allows you to cover more ground and travel farther while still being in nature. Mountain biking typically involves riding up and down steep slopes, between trees, and over rocks. If this sounds too intense or your tires aren't suited for a rocky path, consider taking a road bike or a hybrid on paved trails through forest preserves or along country roads.

D

Preparing Cities for Robot Cars

    The possibility of self-driving robot cars has often seemed like a futurist's dream, years away from materializing in the real world. Well, the future is apparently now. The California Department of Motor Vehicles began giving permits in April for companies to test truly self-driving cars on public roads. The state also cleared the way for companies to sell or rent out self-driving cars, and for companies to operate driverless taxi services. California, it should be noted, isn't leading the way here. Companies have been testing their vehicles in cities across the country. It's hard to predict when driverless cars will be everywhere on our roads. But however long it takes, the technology has the potential to change our transportation systems and our cities, for better or for worse, depending on how the transformation is regulated.

    While much of the debate so far has been focused on the safety of driverless cars(and rightfully so), policymakers also should be talking about how self-driving vehicles can help reduce traffic jams, cut emissions(排放) and offer more convenient, affordable mobility options. The arrival of driverless vehicles is a chance to make sure that those vehicles are environmentally friendly and more shared.

    Do we want to copy — or even worsen — the traffic of today with driverless cars? Imagine a future where most adults own individual self-driving vehicles. They tolerate long, slow journeys to and from work on packed highways because they can work, entertain themselves or sleep on the ride, which encourages urban spread. They take their driverless car to an appointment and set the empty vehicle to circle the building to avoid paying for parking. Instead of walking a few blocks to pick up a child or the dry cleaning, they send the self-driving minibus. The convenience even leads fewer people to take public transport — an unwelcome side effect researchers have already found in ride-hailing(叫车) services.

    A study from the University of California at Davis suggested that replacing petrol-powered private cars worldwide with electric, self-driving and shared systems could reduce carbon emissions from transportation 80% and cut the cost of transportation infrastructure(基础设施) and operations 40% by 2050. Fewer emissions and cheaper travel sound pretty appealing. The first commercially available driverless cars will almost certainly be fielded by ride-hailing services, considering the cost of self-driving technology as well as liability and maintenance issues(责任与维护问题). But driverless car ownership could increase as the prices drop and more people become comfortable with the technology.

    Policymakers should start thinking now about how to make sure the appearance of driverless vehicles doesn't extend the worst aspects of the car-controlled transportation system we have today. The coming technological advancement presents a chance for cities and states to develop transportation systems designed to move more people, and more affordably. The car of the future is coming. We just have to plan for it.

    With the development of science and technology, people find it increasingly difficult to keep pace with the most fashionable smart phones in the world, especially when smart phones are connected with robots. If any robot can take over the world, it's RoBohon. He has all the information you put in your smart phone and can read human feelings. So everyone probably wants to own the cutest smart robot phone.

    RoBohon is very useful. He can project photographs and films, tell you he loves you if he senses you are crying and do everything your smart phone can do.

    RoBohon was created by Japanese electronics company SHARP. The robot phone, with a 2-inch screen fitted into its back, stands 20cm tall and weighs 390 grams. Most surprisingly, he can walk on his own legs around your home and act as a super cute personal assistant. He can even dance. He reads your text messages, announces phone calls, dries your tears and wakes you up. He can even recognize your face and call your name when you enter the room. He will be always at your side keeping you company and providing you with great comfort.

    RoBohon can also serve as an alarm clock. The robot can be a wonderful partner in a small conversation. Though he is expensive, more than double the price of iPhone, who wouldn't want a small personal assistant?

    It started during a yoga class. She felt a strange pull on her neck, a feeling completely foreign to her. Her friend suggested she rush to the emergency room. It turned out that she was having a heart attack.

    She didn't share similar symptoms with someone who was likely to have a heart attack. She exercised, watched her plate and did not smoke. But on reviewing her medical history, I found that her cholesterol (胆固醇) level was sky-high. She had been prescribed a cholesterol-lowering statin (他汀) medication, but she never picked up the prescription because of the scary things she had read about statins on the Internet. She was the victim of fake medical news.

    While misinformation has been the object of great attention in politics, medical misinformation might lead to an increase in deaths. As is true with fake news in general, medical lies tend to spread further than truths on the Internet—and they have very real bad consequences.

    False medical information can also lead to patients experiencing greater side effects through the "nocebo effect (反安慰剂效应) ". Sometimes patients benefit from an intervention (干预) simply because they believe they will—that's the placebo effect (安慰剂效应). The nocebo effect is the opposite. Patients can experience harmful effects because they anticipate them. This is very true of statins. In blinded trials, patients who get statins are no more likely to report feeling muscle aches than patients who get a placebo. Yet, in clinical practice, according to one study, almost a fifth of patients taking statins report side effects, leading many to discontinue the drugs.

    What else is on the fake news hit list? As always, vaccines (疫苗) . False concerns that the vaccine may cause side effects have greatly reduced coverage rates.

    Cancer is another big target for pushers of medical misinformation—many of whom refuse alternative therapies. "Though most people think cancer tumors are bad, they're actually the way your body attempts to contain the harmful cells," one fake news story reads. It warns that prescription medications lead to the uncontrolled cell mutations (变异) .

    Silicon Valley needs to face this problem. I am not a free-speech lawyer, but when human health is at risk, perhaps search engines, social media platforms and websites should be held responsible for promoting or hosting fake information. Meanwhile, journalists should do a better job of spreading accurate information.