When emergency workers arrive at an old firehouse in New York City, the way they greet each other is not what you might expect. These first responders say," Ni Hao!" "Ni Hao" means "hello" in Mandarin Chinese.

    First responders are the first emergency workers to arrive at a fire, traffic accident or other emergency. Some first responders are fire fighters, while others can be Emergency Medical Technicians.

    In Brooklyn, New York, over 20 first responders are studying Mandarin Chinese for about two hours a week. The class is the first of its kind. It is offered by the New York City Fire Department Foundation.

    The U. S. Census Bureau recently reported that some New York neighborhoods are made up mostly of immigrants. Some people have predicted that the Chinese community is likely to become New York's largest immigrant group. They think the city will have' the largest Chinese community outside of Asia.

    The Census Bureau also found that almost 200 languages are spoken in the city. So, knowing different languages is important, especially if you are a first responder.

    Lieutenant(中尉,少尉) Steve Lee is president of the Fire Department's Phoenix Society. He says that first responders must be able to communicate quickly and effectively when an emergency happens. He explains that first responders enter neighborhoods and communities to assist regardless of where they are from. Many times first responders do not speak the same language as the people they are called to help. He adds that it is vital, or very important, that first responders are able to communicate with the people calling for help.

    Without help from homeowners and others, Lee adds, discovering exactly where a fire is burning can be a real problem. First responders need to ask questions such as "What building? What address? What apartment?" And the most important question," Is there anybody left in the building and where?"

    We all think plants were expected to get larger with increased carbon dioxide in the atmosphere, but changes in temperature, humidity(湿度)and nutrient availability seem to have trumped the benefits of increased carbon dioxide" said researchers from the National University of Singapore.

    45 percent of the species studied now reach smaller adult sizes than they did in the past. The researchers pointed out that warmer temperatures and changing habitats, caused by climate change, are possible reasons for shrinking creatures.

    " We do not yet know the mechanisms(机制)involved, or why some organism are getting smaller while others are unaffected," the researchers said. "Until we understand more, we could be risking negative consequences that we can't yet quantify."

    The change is big in cold-blooded animals. Only two decades of warmer temperatures are enough to make retiles (爬行动物)smaller. An increase of only 1 degree centigrade caused nearly a 10 percent increase in metabolism(新陈代谢). Greater use of energy resulted in tiny tortoises and little lizards. Fish are smaller now too. Though overfishing has played a part in reducing numbers, experiments show that warmer temperatures also stop fish growing.

    Warm-blooded animals aren't immune(免除)from the size change caused by climate change. Many birds are now smaller. Soay sheep are thinner. Red deer are weaken And polar bears are smaller, compared with historical records.

    This is not the first time this has happened in Earth's history. 55 million years ago, a warming event similar to the current climate change caused bees, spiders and ants to shrink by 50 to 75 percent over several thousand years. That event happened over a longer time than the current climate change.

    The speed of modem climate change could mean organisms may not respond or adapt quickly enough, especially those with long generation times climate change will be shown in the future.

    We Brits love the idea of a real Christmas tree but not so many of us like the realities of dragging (拖拽) a 7ft Norway Spruce through the house and leaving needles all over the place.

    If you count yourself among the reluctant group, then it may be time to go fake (假的) . After all, buying an artificial Christmas tree needn't mean accepting defeat. There's a huge range of choices and sizes, including pre-lit trees, which will save you the frustration of trying to string your own lights.

    Another big advantage of choosing an artificial Christmas tree is cost: artificial trees can last for decades, so they work out cheaper than paying for a real tree every year. Like now retailers (零售商) are offering great deals at the moment: at Tesco, there's 25 percent off artificial Christmas trees. Meanwhile, you can take advantage of the current 3 for 2 offer at Argos to fill your house with not one, not two, but three. You may perhaps partner up with friends who are also looking to invest.

    Of course, keep your tree for years and years and it will start to pay you back in terms of carbon footprint; however, a “real” one will always have to be transported, used and dealt with every year.

    Are there any downsides? Yes. You might think you're saving the planet, but a fake tree is actually not an environmentally friendly option. Most are made in factories in Asia, resulting in some serious air miles to reach the UK. They're made from metal and plastic, and many end their lives in landfill (垃圾填埋).

    Another problem with a fake tree is that they don't look very natural and of course you won't get that lovely pine smell either. You'll also need to find space for storage.

    Janus, the Roman god, has two faces looking in opposite directions. So does artificial intelligence (AI). On one side are the positive changes, enabling people to achieve more, far more quickly, by using technology to improve their existing skills. Look the other way, though, and there are plenty of potential pitfalls.

    Like Janus, technological change may also cause disruption(混乱), but AI is likely to have a bigger impact than anything since the appearance of computers, and its consequences could be far more disruptive.

    In the years ahead, AI will raise three big questions for bosses and governments. One is the effect on jobs. Although CEOs publicly praise the broad benefits AI will bring, their main interest lies in cutting costs. One European bank asked Infosys to find a way of reducing the staff in its operations department from 50,000 to 500. The McKinsey Global Institute estimates that by 2030 up to 375m people, or 14% of the global workforce, could have their jobs replaced by AI.

    A second important question is how to protect privacy as AI spreads. The internet has already made it possible to track people's digital behavior in minute detail. AI will offer even better tools for businesses to monitor consumers and employees, both online and in the physical world. Consumers are sometimes happy to go along with this if it results in personalised service or promotions. But AI is bound to bring invasion of privacy that is seen as unacceptable. For example, law-enforcement officials around the world will use AI to spot criminals, but may also monitor ordinary citizens.

    The third question is about the effect of AI on competition in business. A technology company that achieves a major breakthrough in artificial intelligence could race ahead of rivals, put others out of business and lessen competition. This is unlikely to happen in the near future, but if it did it would be of great concern.

    It is too early to tell whether the positive changes brought by AI will outweigh the risk. But it will put an end to traditional ways of doing things and start a new era for business and for the world at large.

In life, once on a path, we tend to follow it, for better or worse. What's sad is that even if it's the latter, we often accept it anyway because we are so used to the way things are that we don't even recognize that they could be different. This is a phenomenon psychologist call functional fixedness.

This classic experiment will give you an idea of how it works and a sense of whether you may have fallen into the same trap: People are given a box of tacks (大头钉) and some matches and asked to find a way to attach a candle to a wall so that it burns properly.

Typically, the subjects try tacking the candle to the wall or lighting it to fix it with melted wax. The psychologists had, of course, arranged it so that neither of these obvious approaches would work. The tacks are too short, and the paraffin (石蜡) doesn't stick to the wall. So how can you complete the task? The successful technique is to use the tack box as a candle-holder. You empty it, tack it to the wall. and stand the candle inside it. To think of that, you have to look beyond the box's usual role as a receptacle just for tacks and re-imagine it serving an entirely new purpose. That is difficult because we all suffer to one degree or another from functional fixedness.

The inability to think in new ways affects people in every corner of society. The political theorist Hannah Arendt coined the phrase" frozen thoughts" to describe deeply held ideas that we no longer question but should. In Arendt's eyes, the self- content reliance on such accepted "truths" also made people blind to ideas that didn't fit their worldview, even when there was plenty of evidence for them.

Frozen thinking has nothing to do with intelligence. She said," It can be found in highly intelligent people."

The summer reading season is here. Some people will opt for paperbacks because they' re easy to borrow and share. Others will go for e- readers. But which is the more environmentally sustainable option?

According to 2023 data from the literary industry research group Words Rated, when it comes to pulp(纸浆) and paper, print book publishing is the world's third- largest industrial greenhouse gas producer, and32 million trees are cut down each year in the United States to make paper for books. 

So many publishers are switching to on- demand printing. For example, Chronicle Books, are reducing their initial print runs to see how well the titles sell before they print more. " We felt that it was better to have a higher cost and have less waste, " said Chronic le Books president, Tyrrell Mahoney. 

Publishers are also rethinking book design. It might be a surprise, but certain fonts(字体) can be more climate- friendly by using less ink and less paper. 

Digital reading seems to have a considerable eco- advantage over print because it is paperless, so it saves trees, pulping and shipping. Moreover, tech companies that make e- readers such as Amazon, which sells the market- leading Kindle e- reader, offer recycling programs for old devices. 

" By choosing e- books as an alternative to print, Kindle readers helped save an estimated 2.3 million metric tons of carbon emissions over a two- year period, " said Corey Badcock, head of Kindle product and marketing. 

But digital devices also come with a substantial carbon footprint, mainly at the producing stage. Their cases are made with fossil- fuel- derived plastics and the minerals in their batteries require resource- heavy mining. 

Berners- Lee, the author of The Carbon Footprint of Everything , said the average e- reader has a carbon footprint of around 80 pounds. " This means that I've got to read about 36 small paperback books- worth on it before you break even, " he said. 

" If you buy an e- reader and you read loads and loads of books on it, then it's the lowest carbon thing to do, " Berners- Lee said. " But if I buy it, read a couple of books, and decide that I prefer paperback books, then it's the worst of all worlds. "