Scientists think that growing garden grass could be the secret to solving our energy needs, and we may soon be able to replace our gasoline with "grassoline".

    The team, including experts from Cardiff University in Wales, has shown that hydrogen can be taken from grass in useful amounts with the help of sunlight and a cheap catalyst(催化剂) —something that speeds up a chemical reaction without being used up.

    It is the first time that this has been shown and it could lead to a sustainable(可持续的) way of making hydrogen, reported Asian News International. This could be an important kind of renewable energy because it is high in energy and it does not give out harmful gases when it is burned.

    Study co-author Michael Bowker said, "This is really a green source of energy. Hydrogen is seen as an important future energy carrier as the world moves from fossil fuels to renewable energy, and our research has shown that even garden grass could be a good way of getting it."

    Cellulose(纤维素), which is a key part of plants and the biopolymer(生物聚合物) found in the largest numbers on the earth, could be a great source of hydrogen.

In its study, the team looked at the possibility of getting hydrogen from cellulose using sunlight and a simple catalyst.

    This is called photocatalysis(光催化作用) and in it, the sunlight starts the catalyst, which then makes cellulose and water into hydrogen. The researchers studied the effectiveness of three metal-based catalysts, of which nickel(镍) especially interested the researchers, as it is a much more common metal than gold and palladium(钯) and it saves more money.

    According to Bowker, producing hydrogen from cellulose using photocatalysis has not been studied in detail. The team's research shows that large amounts of hydrogen can be produced using this method with the help of a bit of sunlight and a cheap catalyst.

    The study shows that it is effective to use real grass taken from a garden. "This is important as it avoids the need to separate and clean up cellulose, which can be both difficult and costly," said Bowker.

    Since so much written language we see today comes from a glowing screen, language has begun to change through our interaction with technology. Social media and the Internet have had a rapid and great effect on the English language, and not necessarily for the better. More and more people have found themselves writing in pieces of words and using unclear acronyms(单词首字母) both in written and spoken language.

    How many times have you typed "LOL" in response to a humorous message? Referred to someone as your "BFF"? Exclaimed, "OMG!" during a particularly shocking event? Social media has affected the words we use in our everyday life. Abbreviations and acronyms commonly known as "text talk" have made their way into both spoken and written language. These are becoming increasingly popular as people struggle for brief expressions to meet word limits on social media like Weibo and Twitter. In addition, the speed of the Internet means language is changing faster than ever. You no longer have to be published through physical and traditional means to bring word trends to public attention.

    Many people believe the overuse of these new terms is a passing trend, and nobody will be using them in just a couple of decades. With the change of language, older terms will surely disappear and fall out of style, and newer and more Internet language will take their place.

    But the Oxford English Dictionary thinks the contrary. In 2011, a lot of Internet terms including, "LOL," "BPB," "OMD," and "BFF" were added to the dictionary, making these acronyms official parts of the English language. According to the dictionary writers, these terms aren't going anywhere anytime soon.

    The words you use in everyday life are a reflection of yourself; this is especially true on the Internet with the lack of interaction in real life. With the Internet and social media rapidly getting popular, soon your words may be all you have left. Make them good ones.

    A study found wireless signals are able to pass through bags and suitcases to judge the sizes of dangerous metal objects and identify them." These items could include weapons, chemicals, laptops and batteries for bombs, "the research team said on Tuesday.

    Research suggested that Wi-Fi can now be used to estimate the volume of liquids such as water, acid, alcohol and other chemicals for explosive material. The study led by researchers at the Wireless Information Network Laboratory (WINLAB) in the School. of Engineering showed a wireless device with two to three antennas(天线)that could be fitted in existing Wi-Fi networks.

    The detection system analyzes what happens when wireless signals go through and bounce off objects or materials. The approach, which the paper states, works by separating the wireless interference(干扰)caused by two factors of objects-the material and shape." Most dangerous objects such as weapons are usually metal or liquid, which have significant interference," researchers said.

    When it was tested on a backpack, the accuracy rate topped 95 percent. "But the accuracy dropped to about 90 percent when objects inside bags are wrapped. And the tech could save lives if used in museums, stadiums, theme parks or schools," the team said, noting its design can inspect bags or luggage without being an exposure to privacy.

    It uses channel state information (CSI) that is readily available in low-cost Wi-Fi devices." This could have a great impact on protecting the public from dangerous objects," said Yingying Chen, a co-author of the study," There's a growing need for that now. In large public areas, it's hard to set up expensive screening equipment like what's in airports. Manpower is always needed to check bags and we want to develop a method to try to reduce manpower.”

    The peer-reviewed study, which recently won a best paper award at the 2018 IEEE Conference on Communications and Network Security, is now published online." Future work will continue to focus on ameliorating the accuracy of identifying objects and imaging shapes and volumes," researchers said.

    TESCO has announced it is banning the sale of energy drinks to teenagers, and that the big move will begin in weeks. The supermarket has joined a host of major names banning teenagers from buying high caffeine, high-sugar drinks. The government indicates that the principal question to be determined is whether the purchasing restrictions will apply at the age of 16 or 18.

    Theresa May said the consultation was linked to the government's childhood obesity (肥胖) strategy and said it was necessary to examine the consumption of energy drinks "often because they are sold at cheaper prices than soft drinks".

    The principal reason for the ban is the high level of caffeine in the energy drinks, which has been linked to a string of health problems for children, including head and stomach aches as well as sleep problems.

    Energy drinks often also have higher levels of sugar than soft drinks. According to government figures, sugared energy drinks have 60% more calories and 65% more sugar than normal soft drinks and sugar is one of the largest causes of obesity.

    Jamie Oliver said he welcomed the ban on energy drink sales because "too many children are regularly using them to replace breakfast" and "teachers from across the country have told me how their lessons are disrupted because of these drinks".

    A Downing Street source added that there is no evidence that energy drinks have any nutritional value in children's diet. That accounts for the government's action on measures to tackle childhood obesity and improve children's health.

    The move is the latest step in an approach in relation to childhood obesity and health. According to European Food Safety Authority research, two-thirds of 10 to 16-year-olds regularly consume energy drinks, along with 18% of 3 to 10-year-olds.

Let's be friends!

If you feel that making friends as an adult isn't as easy as it used to be, you're right. Though it becomes increasingly difficult, healthy friendships make a difference in our life. They can help us age better, deal with stress and live longer lives. {#blank#}1{#/blank#}

Be optimistic

In a 2022 study, researchers found that people who received an unexpected communication, such as a small gift felt more grateful than the senders thought. Not surprisingly, a positive attitude can help us make friends. {#blank#}2{#/blank#} If we think we're going to be liked, we will become more likable.
   {#blank#}3{#/blank#}

"Write down the names of three to five people you know but would like to be closer to," suggest experts. Then reach out to each of them: Send a text message, a shared photo, or an article that make you think of them. See if a small action might make a deeper connection.

Branch out

{#blank#}4{#/blank#} Nobody gives you all you need. Just a few good mates can make all the difference. A 2020 Study found that those with three to five close friends had higher levels of satisfaction with life.

Practice

After the pandemic （疫情）, many of us forgot how to socialize. {#blank#}5{#/blank#} In a 2022 study, participants were required to talk to strangers every day for a week. And what do you know? In the end, people were less worried and more confident.

A. Make a list

B. Send messages

C. Friendships don't just happen.

D. Don't limit yourself to one close friend.

E. Social skills are like muscles—we can work them.

F. Here are tips for making and deepening friendships.

G. But most of the time we don't realize how much people like us.

when we feel unhappy again(cue), rather than eat snacks, we could listen to some of our favourite music instead(routine), which will make us feel relaxed. Aside {#blank#}1{#/blank#} changing bad habits, we can also use the habit cycle to create good habits. For example, when we come to an escalator, our normal routine is to ride it, but we could change this routine into something more positive by {#blank#}2{#/blank#}(take) the stairs instead. 

Many of us try to change bad habits quickly, and {#blank#}3{#/blank#} we are not suc-cessful straight away, we often become pessimistic and give up. In fact, the {#blank#}4{#/blank#}(successful) way to change is not suddenly, but over a period of time. As the Chinese philosopher Lao Zi wrote, "A journey of a thousand miles begins with {#blank#}5{#/blank#} single step. "One step {#blank#}6{#/blank#}(seem) small, but it is essential. To reach the goal of change, a person must show some discipline and {#blank#}7{#/blank#}(repeat) take many small steps. After all, it is not easy to break bad habits. 

For young people, there is plenty of time to change bad habits. However, there {#blank#}8{#/blank#}(be) no"magic pill"or delete button that will help you; you have to think about your bad habits and determine to make some {#blank#}9{#/blank#}(change). You have the power {#blank#}10{#/blank#}( build) a happy and healthy life full of good habits!