For ages word has been going around that the dog is man’s best friend. I agree. A dog can be handy as a night watchman around the house, as a pointer on a hunting trip, as a guardian and playmate for the children. But I think that having a dog for a pet is so expensive and annoying that I can do     1     such a friend.

Providing for the dog’s needs is so expensive that the animal should be an income tax deduction. There’s the medical bill for shots to keep the animal healthy. Unless it’s kept in the house 24 hours a day, a female must be given “preventive maintenance,” a ten-to twenty-dollar investment. Otherwise,     2     you know it, you’ll have more “income tax deductions” in your family. And dogs have to eat. Don’t think you can buy a case of Ken-L-Ration and be done with it. A dog can be as particular about food as a French expert. To feed even a Chihuahua, a very small Mexican dog, you’ll spend three to five dollars     3     week. If you own a big dog, you need a large dog-house. They’re expensive. A carpenter will build a luxurious model for about seventy-five dollars. For about thirty dollars’ worth of materials, a weekend’s work, and a smashed thumb, you can build a simple one     4     . And these are only the major costs.

A dog is so annoying that no one in his right mind would want to own one.     5     (consider) the dog owner blessed with a dog that fetches slippers, rubber toys, newspapers. Have you eased your bare feet into slippers bitten by dogs, seen a living room destroyed by a toy boxer, tried to read a newspaper chewed to wet pieces by an obedient Boston bull? And dogs make noise. Some huge dogs bark all night. But you aren’t the only one     6     (endure) sleepless nights; your neighbors let you know they didn’t sleep either. Policemen are frequent visitors to dog owners’ homes. They inquire about holes     7     (report) dug in neighbors’ flower beds, prize cats injured and bleeding, and pet chickens and ducks sent to their reward. Suspect: your dog! You deny everything, of course. Rex, you assure the officers, was asleep by the door. But you secretly suspect him, because you don’t really know where Rex was all week. And you remember     8     (wonder) why feathers were floating in his water bowl yesterday. Dogs are annoying. Neither a fire-breathing mother-in-law nor a talkative wife will prove more annoying to a man than a dog.

Dog lovers will, of course, claim my argument one-sided, even exaggerated. They might consider me as cruel as the Russians,     9     possibly attempting to solve their own canine crisis — shot Fido into orbit. But the fact remains: if our     10     (good) friends caused us the expense and annoyance our dog does, we’d soon encourage them to become astronauts.

4 . About 50 years ago, the famous British band The Beatles sang that “money can’t buy me love”. Today, British economists are saying that it perhaps can’t buy you happiness cither. This is showed by the Happy Planet Index (HPI 快乐指数) published recently by the New Economics Foundation (NEF) in London.

The index is about how well countries are using their resources. It shows how well they provide people with better health and longer and happier lives, and at what cost to their environment.

It would seem to be common sense that people in richer countries live happier lives, while those in developing countries are having a harder time. But the results are surprising, even shocking. The numbers show that some of the so-called developed countries are performing very badly. The United States, for example, ranks number 150^th. On the other hand, some little-known developing countries are doing a much better job. A tiny island in the Pacific, Vanuatu, comes in first. There are 178 countries and areas in the index. China ranks number 31.

Countries are graded on the basis of information supplied in response to the following questions. How do people feel about their lives? How long does an average person live? How greatly does a country need to use its natural resources to maintain its living standards? This is what the index calls the “ecological footprint”.

The NEF found that the people of island nations enjoy the highest HPI rankings. Their populations live happier and longer lives, and use fewer resources.

The results also seem to show that it is possible to live longer, happier lives with a much smaller environment impact. The index points out that people in the US and Germany enjoy similar lives.

“However, Germany’s ecological footprint is only about half that of the US. This means that Germany is around twice as efficient as the US at producing happy lives,” says Nic Marks, head of NEF’s Center for well-being.

So the Happy Planet Index (HPI) tells us a brand-new concept of understanding “being happy”. HPI figures out different countries or individuals’ HPI through their “Ecological Footprint” and “Life Satisfaction Level” or “Life Expectancy”. Clearly, people’s HPI is related to their consumption of the resources on the earth.

You can find out your own HPI by visiting http: //www, happyplanetindex.org.

5 . Just before Italy’s second lockdown in November 2020, the banks of Milan’s Grand Canal were busy with people. Bargain hunters picked their way through market stalls.     1     The clear water of the canal reflected the dazzling autumn sunshine.

This is a familiar scene in Milan’s Navigli district on the last Sunday of every month. Located in the city’s south-west corner, the Navigli district remains one of the last true connections the Milanese have with water. The Grand Canal (Naviglio Grande) itself dates back to 1177.

Although not widely known, Milan’s centre was once traced with waterways, like those of Venice.     2     London has the Thames. Paris, the Seine. Berlin was built around the banks of the Spree. Yet, Milan, one of the wealthiest cities in Europe, has none. The city had to make one for itself. Between the 12th and 17th centuries, a network of canals was developed in order to grow the city’s wealth and influence.

Most of the last traces of this network can be seen in Navigli. The rest fell victim to modernisation during the mid-20th century. As automobiles and trains replaced boats, the Inner Ring was buried under concrete (混凝土). For the most part, the canals are still there, covered over by new roads and buildings.

    3     The Darsena sits at the meeting point of two of Milan’s last canals, Naviglio Grande and Naviglio Pavese. Once one of Italy’s busiest ports, the harbourside area has lain largely unused since the 1960s. In 2015, it was completely renovated for the Milan Expo.

Today, the Darsena provides a vital lung to one of Europe’s most polluted cities. Every day, people walk along its banks or sit with a takeaway drink from the many bars which are located nearby. Old men teach their grandkids the patient art of fishing, while runners trace loops around the boardwalk.     4    

Currently, designs are being drafted for an underground tunnel to allow the water to pass through the city’s centre. It is hoped that the project will be completed by 2026 when Milan is set to co-host the Winter Olympics.

6 . Back in 2015 my colleague Adam Frank of the University of Rochester and I were having lunch near Columbia University's campus in New York City. As at Fermi's lunch 65 years earlier, the conversation was about the nature of spacefaring species. And inspired by Fermi's mental calculation, we were trying to craft an investigative strategy that made the fewest possible unsubstantiated assumptions and that could be somehow tested or constrained with real data. At the center of this exercise was the simple thought that waves of exploration or settlement could come and go across the galaxy, with humans happening to come into being in one of the lonely periods.

This idea relates to Hart's original fact: that there is no evidence here on Earth today of extraterrestrial（外星的）explorers. But it goes further by asking whether we can obtain meaningful limits on galactic（星系的）life by constraining the exact length of time over which Earth might have gone unvisited. Perhaps long, long ago extraterrestrial explorers came and went. A number of scientists have, over the years, discussed the possibility of looking for artifacts that might have been left behind after such visitations of our solar system. The necessary scope of a complete search is hard to predict, but the situation on Earth alone turns out to be a bit more manageable. In 2018 another of my colleagues, Gavin Schmidt of NASA's Goddard Institute for Space Studies, together with Adam Frank, produced a critical assessment of whether we could even tell if there had been an earlier industrial civilization on our planet.

As fantastic as it may seem, Schmidt and Frank argue—as do most planetary scientists—that it is actually very easy for time to erase essentially all signs of technological life on Earth. The only real evidence after a million or more years would boil down to isotopic or chemical stratigraphic anomalies—odd features such as synthetic molecules, plastics or radioactive fallout. Fossil remains and other paleontological markers are so rare that they might not tell us anything in this case.

Indeed, modern human urbanization covers only on order of about 1 percent of the planetary surface, providing a very small target area for any paleontologists（古生物学家）in the distant future. Schmidt and Frank also conclude that nobody has yet performed the necessary experiments to look exhaustively for such non-natural signatures on Earth. The bottom line is, if an industrial civilization on the scale of our own had existed a few million years ago, we might not know about it. That absolutely does not mean one existed; it indicates only that the possibility cannot be completely eliminated.

Using renewables seems to cut carbon more than nuclear. Nations that embraced renewable forms of energy have significantly cut their carbon emissions, but     1     pursuing nuclear power have failed to do so, researchers have found.

Nuclear and renewables are seen as two key ways for governments to decarbonize(去碳), but the question of   whether one is more effective for dealing with climate change     2     (not address) fully. With several countries on the brink of deciding whether    3     (back) new nuclear power plants to meet their carbon targets, the answer to this question matters

To find out, Benjamin Sovacool at the University of Sussex and his colleagues looked at carbon dioxide (CO2) emissions and GDP over 25 years. They found that in 117 countries that had been using renewables, CO2 emissions per capita(人均地)dropped from 0.69 tonnes(公吨)on average between 1990 and 2004 to 0.61 tonnes between 2000 and 2014 and     4     these latter figures included a further six countries.

During the same periods, however, the 30 countries that had been using nuclear power largely stayed flat, shifting from an average 0.52 tonnes of Co2 emissions per capita to 0.51. The two groups of countries overlap because some fall into both. Renewables included wind, solar, hydroelectric, and biomass energy. “If you’re focusing on    5     we can do to reduce emissions in the next 15 years,     6     (pursue) renewables instead of nuclear,” says Sovacool.

The reason    7     the results is not clear — the analysis found a connection, not a causation—but Sovacool has ideas. Nuclear power is restricted due to agreements     8     (limit) the spread of nuclear weapons     9     material from reactors (核反应堆) can be used to make bombs. Renewables are not, enabling more countries to learn from one another, such as Germany benefiting from Chinese economies of scale on solar. Other reasons for this    10     be that renewables are cheaper and quicker to build and more socially acceptable, says Sovacool.

9 . How to save planet earth

Have you ever held a product in your hands and considered the existential weight of your purchase? Beyond each price tag hides a ripple effect. It expands from soil to water ways, grocery aisle to kitchen plates, factories to fulfillment centers and mail slots to landfills. This global impact has become less hidden in the past decade, and ignoring the people downstream from us has grown increasingly difficult.

We’re more aware than ever of the mark our consumption leaves on planet Earth, which now sustains nearly 8 billion people. Somehow, humans are still pumping more than 30 gig a tons of carbon dioxide(CO₂)per year into the atmosphere, despite the mountain of evidence that CO₂ is the top contributor to greenhouse gases causing global warming.     1    We know we need to do better, but we feel helpless and overwhelmed. Let’s call this the eco-essential crisis; it applies on a deeply personal level for most environmentally aware humans, and on a global scale.

Climate journalist and author Tatiana Schlossberg says even a simple trip to the supermarket can feel paralyzing in 2021. “I want to buy the local thing, but it’s not organic. Or, maybe it’s in a plastic box,” she says. In her 2019 book Inconspicuous Consumption, she ventures way beyond the store aisle and into the web of less apparent ways that humans are damaging Earth. For example, your internet use is tied to extensive carbon emissions and energy consumption.     2     The world is more complicated than that.

In fact, being a good citizen on planet Earth with climate concerns, you’ve likely asked or agonized over this question: What should I do?     3     So, we took this question to five people who have immersed their careers, research and writing in the realities of climate science.

One of their most consistent insights may surprise you: Consumer responsibility misses the mark. “One of the major failings of the environmental movement is having everyone focus on these small things that everyone can do.” says Ayana Elizabeth Johnson-a marine biologist and co-host of the podcast How to Save a Planet.     4     There are just more meaningful and long-lasting ways to expend your energy in the climate fight. Most of them involve organization and collective action.

“Individuals join together to collectively have far more power changing the system than they can as individuals,” says Anthony Leiserowitz, director of the Yale Program on Climate Change Communication.

On Horseback Among the Eagle Hunters

Nine-year-old Dastan, the son of a Kazakh (哈萨克族) eagle hunter, rode his pony alongside mine, running effortlessly without a saddle (马鞍) and giggling at my attempts to show my pony some affection. Surrounding us was the vast,     1     landscape of the Altai Mountains of western Mongolia, with a dusting of snow heralding the arrival of winter.

I spent almost three years living and working in northern Iraq, where I     2     the country’s efforts to defeat the Islamic State (伊斯兰国). In October 2019, I began working on a personal photography project. My goal was to explore the relationships between animals and the people whose livelihoods depend on them. To start, I flew to western Mongolia to meet and photograph the iconic Kazakh hunters, horsemen and animal herders (牧人).

Deep in the Altai Mountains, the Kazakh people have for centuries developed a special     3     with golden eagles. Alankush, an eagle hunter, said he looks after his eagle “as if she were a baby.” The ancient custom of hunting with eagles on horseback is     4     passed down from father to son and is considered a great source of pride.

In recent generations, many Kazakh families have migrated from the countryside to the country’s urban areas. This is partly because of the difficulties in     5     health care, education, social services and employment opportunities. Among those who have stayed, the ancient practice has provided an additional source of income from the visitors who pay to see the     6     birds in action.

Training and caring for golden eagles is just one aspect of an animal herder’s life. Others include training young horses,     7     sheep, and butchering meat. The daily demands of a traditional herding family’s life can leave little time for additional education. In response to their physically     8     lifestyles, parents who work as herders often send their children to boarding schools. They hope that their children will secure a more comfortable future. Paradoxically, such parental ambitions may result in the eventual disappearance of a culture and way of life that has survived for generations.

    9    , documenting the traditional ways of life in western Mongolia stands in contrast to my time spent photographing scenes of conflict and suffering in Iraq. The two subjects, however, share a common theme: the human struggle not just to survive, but to build a better future for oneself and one’s family. Despite the differences in the surroundings and the     10     of the challenges faced by the people I met, I felt a connection with the Kazakh horsemen, through our mutual affection for horses.