The State of California is depending on its forests to help cut down planet-warming CO2. But that climate-change strategy may be risky, as new research from the University of California, Irvine(UCI)reports that trees in California’s mountains and open spaces are dying from wildfires and other pressures — and fewer new trees are filling the blank.
“The forests are not keeping up with these large fires,” said study co-author James Randerson, the Ralph J. and Carol M. Cicerone Professor of Earth system science at UCI. Acrossthe whole state, tree cover area has dropped 6.7% since 1985. “These are big changes in lessthan forty years,” he said. It’s the first time that researchers have been able to measure tree population fall in California, and find out the reasons(wildfires and woodcutting).
For the study, the UCI-led team used satellite data from the USGS and NASA’s Landsat mission to study plant changes between 1985 and 2021. They found that one of the most obvious falls in tree cover was in southern California, where 14% of the tree population in local mountain had disappeared, maybe everlastingly.
“The ability. of forests to recover(恢复)from fire appears to be dwindling in the south,” said Jonathan Wang, a researcher in Randerson’s research group, who led the study coming out in AGU Advances. “At the same time, the state’s coverage of bushes and grasses is rising, which could mean more everlasting ecosystem shifts(生态系统转化).”
“The speed and scale of fall in tree cover is different across the state. Tree cover in the Sierra Nevada, for example, stayed relatively unchanged until around 2010, then began dropping suddenly. Fortunately, in the north, there’s plenty of recovery after fire,” said Wang, perhaps because of the area’s higher rainfall and cooler temperatures. “This threat(威胁) to California’s climate solutions isn’t going away anytime soon,” Wang said. “We might be entering a new age of bigger fire and vulnerable(易受损的) forests.”
1. What mainly helped California cut down CO2?A.Rich forests. | B.Less vehicles. |
C.Energy saving. | D.Fine weather. |
A.Poor soil. |
B.Continual floods. |
C.High demand for farmland and food. |
D.Large wildfires and people’s cutting trees. |
A.Suitable. | B.Falling. | C.Obvious. | D.Boring. |
A.California’s trees will die out in the future |
B.California’s environment will face a big challenge |
C.The reasonfor California wildfires has been found out |
D.Wildfires seriously threaten California’s tree cover |
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【推荐1】A new United Nations report says a warming planet and changes to land use suggest an increase in wildfires around the world in the coming years. The report says these wildfires will cause an increase in smoke pollution and other problems that world governments are not prepared for.
The western United States, central India and eastern Australia are already seeing more wildfires. Even areas once considered safe from major fires, such as the Arctic, will very likely experience a major increase in burning. Tropical (热带的) forests in Indonesia and the southern Amazon of South America are also likely to see increased wildfires, according to the report.
The report describes n worsening series of events. Climate change will bring more dry periods and higher temperatures that make it easy for fires to start and spread. Those fires then give off more climate-changing carbon into the atmosphere as they burn through forests. Some areas, including parts of Africa, are seeing a fall in wildfires. That is because more land is being used for agriculture.
But UN researchers said many nations continue to spend too much time and money fighting fires and not enough trying to get rid of the causes of fires. Land use changes can make the fires worse. The report said the remains left behind by the logging (伐木) industry can easily burn. And some forests are purposely burned to clear land for farming.
Poor communities are often hit hardest by fires. Wildfires can worsen water quality, destroy crops and reduce land available to grow food. They affect people’s jobs and their economic situation. Fires are as harmful as floods and droughts.
UN researchers also called for more careful attention to the dangers from wildfire smoke inhalation, which can affect tens of millions of people’s health each year. Smoke from major wildfires can travel thousands of kilometers across international borders.
1. What does the second paragraph show us?A.Main reasons for some wildfires. | B.The differences between wildfires. |
C.The importance of the report. | D.Some findings of the report. |
A.Forests are well protected. |
B.Land for agriculture is increasing. |
C.Temperatures are not so high. |
D.Farmers are more careful of fires. |
A.Many nations fail to put out fires. |
B.Too much money is wasted on fires. |
C.More should be done to prevent fires. |
D.Farmland should be turned into forests. |
A.Turning up. | B.Breathing in. |
C.Gathering together. | D.Giving off. |
【推荐2】As a child, I had spent my holidays travelling our village in Bangladesh — running across the rice fields or farms and fishing in lakes. But, this had started to wear off as a teen. One thing I remember about that trip was when we were only about half an hour from our village, we had to get out of our car. The road in front of us was completely under water. We all got on a bamboo boat for another two or three hours.
That was 15 years ago — the last time I visited our village. One by one, many other villagers left there. But my father has been working hard to build it up. He doesn’t want it to be lost.
Yes, we should protect our home. But there is something else to think about: climate crisis (气候危机). Bangladesh is at the centre of the climate crisis — it is hit by floods, droughts, storms and other natural disasters. “I jokingly say, Bangladesh is God’s laboratory for natural disasters,” says Prof Ainun Nishat, an expert on climate change from Bangladesh.
The period from June to October sees heavy rains. But the rainfall time is becoming more erratic (无常的). In 2020, Sylhet, my hometown, was hit by huge floods that affected thousands of families, whose homes were swept away. In fact, over a quarter of the country was flooded. Nearly 1.3 million homes were damaged, and hundreds of people died.
The weather is getting more extreme (极端的). It is getting too hot. And the supply of water can’t be relied upon, leaving the land getting drier.
Although people have worries about droughts and floods, unlike in the past, the country is well-prepared to deal with them. Prof Nishat says, “Maybe 20, 30 years back we depended on external (外部的) support to return to normal from any natural disaster, but now it’s different. The country has developed, and we suffered these disasters many times, so the people are one of the most prepared.”
1. What do the underlined words “wear off” in Paragraph 1 probably mean?A.Advance. | B.Make sense. |
C.Disappear. | D.Lose control. |
A.It is affected by many disasters. |
B.It needs more people to build it up. |
C.People living there lead an unhappy life. |
D.Experts are studying why the climate changes there. |
A.To prove floods are difficult to avoid. |
B.To show the effects of climate change. |
C.To prove floods are frequent in Bangladesh. |
D.To show the great damage caused by floods. |
A.People in Bangladesh think the external support is unnecessary. |
B.People in Bangladesh try to rebuild their homes on their own. |
C.Bangladesh needs more support to aid its development. |
D.Bangladesh is trying hard to deal with climate change. |
【推荐3】How to Survive a Tsunami
A tsunami is a series of destructive and dangerous waves that are typically caused by earthquakes. If you live in a tsunami hazard region, make sure you know what to do in the unfortunate event of a tsunami.
1. Evacuate on foot if possible.
Bridges and roads might be damaged or blocked after an earthquake. Whether there is an official tsunami warning or you live in a tsunami hazard zone and an earthquake just happened, immediately start moving on foot.
2.
In some cases, you might not have time to evacuate. If you don’t have time to get away, go up to a third floor or higher in a strong building. Even better, try to get on the roof of the tallest, strongest building you can find. If you’re right on the coast, there might be a tall tsunami evacuation tower nearby. Look for evacuation route signs and follow them to the tower, then climb to the top.
3. Grab something floating if you’re in the water.
This can help keep you safe if you get caught by a tsunami’s waves.
4.
Tsunami activity can continue for up to 8 hours or longer. Stay away from the coast and on high ground for this period to play it safe. Listen to announcements from officials and only move when they say it’s safe to do so.
You may be stressed out and worried about loved ones, but you must stay where you are and try to remain calm. Don’t put your life at risk to try to meet up with someone in another area.
A.Look for a boat to stay on. |
B.Walk or run towards safety quickly. |
C.Stay in your safe spot for at least 8 hours. |
D.Climb to the top of a building if you are trapped. |
E.Here are some ways to react and survive a tsunami. |
F.Look for something strong like a tree, a door or a life raft. |
G.Join the rescue team in order to search for your loved ones. |
【推荐1】In 1872, the first national park was set up in the US. It's the Yellowstone National Park, which was listed as a World Heritage Site in 1978. Today the country is home to 59 national parks. Here is a list of some of the best received ones.
Great Smoky Mountains National Park
This park is a part of the Smoky Mountains. It lies at the border between the US states of North Carolina and Tennessee. It's the country' s most visited national park. It was listed as a World Heritage Site in 1983. Tourists visiting the park can enjoy different activities like biking, hiking, horseback riding, fishing, etc.
Grand Canyon National Park
Almost every international tourist to the US visits this national park, making it the second most visited national park in the US. It lies in northwestern Arizona and is home to the Grand Canyon of the Colorado River. It was listed as a World Heritage Site in 1979. Covering an area of 4. 920. 08 square km, the park offers many activities to the visitors like driving and walking tours, hiking biking, etc.
Yosemite National Park
This national park lies in the Sierra Nevada mountain range of Northern California. It's known for its waterfalls, mountains, lakes, and wildlife. It was listed as a World Heritage Site in 1984. The 3 ,026. 87-square-km-harge park is home to different animals such as black bears, red foxes, etc.
Cuyahoga Valley National Park
The national park lies in northeast Ohio. Set up in 2000, it offers a lot of activities like bicycling, hiking, wildlife watching, etc. The waterfalls, caves, hill, farmlands, and more make the experience of visiting the national park a memorable experience.
1. Which of the following parks is the first to become a World Heritage Site?A.Great Smoky Mountains National Park. |
B.Grand Canyon National Park. |
C.Yellowstone National Park. |
D.Yosemite National park |
A.They both have waterfalls |
B.They both lie between two states. |
C.They both allow visitors to hunting. |
D.They both offer biking and biking activities. |
A.Standards of becoming national parks. |
B.A brief history of American national parks. |
C.Benefits of visiting American national parks. |
D.Some most popular national parks in the US. |
【推荐2】Here are four beautiful lakes in the world, each of which can be your next destination.
Lake Bled, Slovenia
Few lakes in Europe come as postcard-ready as Slovenia’s Lake Bled. Located in the snow-capped Julian Alps about a 45-minute drive outside of the capital city of Ljubljana, it’s best known for the fairytale-like Church of the Assumption, which sits on a pocket-sized island in the lake and has been attracting visitors for centuries.
Lake Annecy, France
Thanks to strict environmental rules set in place in the 1960s, Lake Annecy is an undamaged body of water that’s often called the cleanest lake in Europe. As a home base, you can't beat Annecy, which has been called the Venice of the Alps for its series of canals, and the Imperial Palace, which has more than 100 years.
Lake Vattern, Sweden
During a Swedish summer, there are few better places to enjoy the endless summer nights than sitting by the nation’s lakes. Among the lakes, the most charming is this finger-shaped lake about a 3-hour drive southwest of Stockholm, surrounded by historic settlements like Hjo, a beautifully preserved town on the lake's western shore.
Qinghai Lake, China
Located in northwest China, Qinghai Lake enjoys a climate with low rainfalls. When looking into the distance from a high place, you can enjoy a photographic view of the revolving evergreen mountains, clear and glittering water, beautiful grassland and groups of sheep.
1. What can we learn about Lake Annecy?A.It is under good protection. |
B.It is located on an island. |
C.It’s the cleanest globally. |
D.It is known for an old church. |
A.A circle. | B.A pocket. | C.A finger. | D.a foot. |
A.Lake Bled. | B.Lake Annecy. |
C.Lake Vättern. | D.Qinghai Lake. |
In 1890 Yosemite became a national park. It had been inhabited (居住) by Miwok people for some 4,000 years. Yet during the Gold Rush from 1849 to 1851, the land saw the coming of thousands of miners. In 1851 the Miwok people began to be removed by force from their homes. By 1910, just one in ten of the original inhabitants remained.
Sequoia National Park, California
This national park was established on 25 September 1890. It was created protect the towering sequoia trees. Today, the oldest tree in the 629-square mile park is the General Sherman Tree -it’s thought to be 2,300 to 2,700 years old. The park’s diverse landscape includes the Sierra Nevada mountains, as well as deep valleys, craggy foothills and impressive caves.
Deadwood, South Dakota
It might look like a western film but Deadwood is the real deal. After the discovery of gold in the nearby southern Black Hills in 1874, some 250,000 miners poured to the region and the city was founded in 1876. Owing its name to the dead trees filling the valley in which it was built, it quickly earned a reputation as a lawless outpost associated with gambling, gold seekers and Wild West legends (传奇).
Whitney Plantation, Louisiana
Whitney Plantation is a reminder of America’s history of slavery (奴隶制). Established in 1752, the site was home to more than 350 slaves, whose names can be seen carved onto the Wall of Honor today. A recording from 1819 reveals that 19 out of the 61 slaves on the plantation at the time were African -born survivors of an Atlantic crossing. Today, visitors can learn more about the lives of enslaved people during this period.
1. What do Yosemite National Park and Deadwood have in common?A.They are famous movie sets. | B.They were founded in the 1870s. |
C.They used to be flooded by gold miners. | D.They are inhabited by native Americans. |
A.Yosemite National Park. | B.Sequoia National Park. |
C.Deadwood. | D.Whitney Plantation. |
A.Places of natural beauty. | B.Places to learn about slavery. |
C.Places located in deep valleys. | D.Places giving a sense of history. |
【推荐1】A sense that life has meaning doesn’t just offer philosophical benefit; it’s also tied to improved physical and mental health. What factors, apart from close relationships and personal accomplishments, foster (培养) a belief in a meaningful life? Three recent studies highlight some potential mechanisms of meaning.
What really matters? Researchers who study meaning in life have broken the concept into three aspects: coherence (the feeling that life makes sense), purpose (having and working toward goals), and mattering (the sense that one’s life has value and makes a difference). University of Sussex psychologist Vlad Costin argues the last factor, mattering, may be the most crucial.
In three experiments, participants’ sense of mattering most reliably predicted whether they saw life as meaningful one month later. Though it wasn’t known why participants felt their lives mattered, Costin thinks that it could have resulted from their contributing to others.
What’s the golden age of life? Confidence in life’s meaningfulness may be greatest around age 60, on average, a recent study suggests. Using data from 1,042 U.S. adults, University of California, San Diego, researchers found that the presence of meaning in life followed a curve (曲线) over the lifespan (寿命), reaching its peak at approximately 60 before declining again. The search for meaning, on the other hand, followed the opposite track, reaching a low point at 60 before climbing. Regardless of age, physical and mental well-being were both strongly correlated with a belief in life’s meaning.
Many seek meaning through extraordinary experiences-but they may also find it in ordinary, daily acts. New research found that a preference for routines was correlated with a greater sense of meaning. Students tracked for a week reported somewhat greater meaning, on average, when engaging in everyday acts such as studying or working-perhaps, the authors note, because routines build a coherent sense of self. Study co-author and Rutgers University psychologist Samantha Heintzelman observes: “Moments that make sense and feel right can make life meaningful, too.”
1. What is the most important for life’s meaningfulness according to Costin?A.Physical and mental well-being. |
B.The feeling that life makes sense. |
C.Having and working toward goals. |
D.The sense that one’s life has value. |
A.Having the strongest body. |
B.Helping those in great need. |
C.Gaining their favorite books. |
D.Going on a holiday with their family. |
A.Life’s meaningfuIness is not affected by age. |
B.People aged over 60 have a high level of wisdom. |
C.People aged about 60 believe most in the meaning of life. |
D.The healthier you are, the more meaningful life is. |
A.What Makes Life Meaningful |
B.Why People’s Life is Meaningful |
C.When to Reach the Golden Age of Life |
D.How to Find Meaning in Life |
【推荐2】The first time I went to France, I was shocked by the cultural differences in daily routines and manners. Born and brought up in Britain, I used to believe that we share the same cultural manners with our European neighbour. But how wrong I was!
The most challenging difference for me was the food and eating time. After one month of living here, I still got strange looks as I ate my homemade sandwiches behind a computer screen while the other colleagues enjoyed a three-course meal in the canteen. They also had a two-hour "pause" which seemed to involve every employee in France. What's more, having evening meals at 6 pm was a common habit for people from the north of England, like me. Therefore, an evening meal at 9 pm was quite challenging for my stomach. After realising the fact that the local snacks were worth the wait, however, I quickly accustomed to this more relaxing way of life, which was hard to imagine before I came here.
Another aspect of French food and drink culture that I found hard to adapt to at first is the cafe culture. I am getting used to a quick espresso(浓咖啡 ), but deep down I have to admit that when catching up with an old friend, nothing suits more than a tall latte(1#)and a slice of homemade cake, preferably in a comfortable English tea room
Finally, there go greetings. At home I feel comfortable shaking someone's hand on the first meeting. So when I greeted a stranger with two kisses on the cheeks, I felt slightly out of my comfort zone. I do,though, appreciate this part of the French culture.
Being exposed to cultural differences is a unique experience which makes you appreciate your roots more and open your eyes to the diversity of the world.
1. What do we know about the food and eating time in France?A.French people eat a quick lunch at work. |
B.French people have a three-course meal in the evening. |
C.French people usually eat evening meals at 6 pm. |
D.An evening meal at 9 pm is quite common in France. |
A.used | B.adapted | C.abandoned | D.refused |
A.Comfortable . | B.Challenging but enriching . | C.Hard to adapt to. | D.Unworthy. |
【推荐3】Tourists visiting La Gomera and El Hierro in the Canary Islands can often hear locals communicating over long distances by whistling—not a tune, but the Spanish language called Silbo. Whistled languages are almost always developed by traditional cultures that live in rough, mountainous regions or in thick forest. Skilled whistlers can reach 120 decibels (分贝). As a result, whistled speech can be understood up to 10 times as far away as ordinary shouting can, experts have found.
But whistling mainly works for non-tonal (非声调的) languages, where the pitch (音高) of speech sounds isn’t crucial to the meaning of the word. English, Spanish and most other European languages are non-tonal languages. For tonal languages, in contrast, the meaning of a sound depends on its pitch relative to the rest of the sentence. In Chinese, for example, the syllable “ma” said with a steady high pitch means “mother”, but said with a pitch that dips and rises again, it means “horse”.
The whistled version of speech doesn’t contain as much frequency information as ordinary spoken language, but it does carry enough to recognize words. When researchers tested people’s comprehension of whistled Turkish, they found that experienced listeners correctly identified isolated words about 70 percent of the time; for words in common whistled sentences, with the help of the context, the accuracy rose to approximately 80 to 90 percent. Experts know surprisingly few details about how the brain does this. The information crucial for understanding speech, they assume, must lie somewhere within that whistled signal.
Whistled languages excite language experts for another reason, too. They share many features with what experts think the first languages must have been like, when speech and language first appeared during the dawn of modern humans. One of the big challenges of language is the need to control the vocal cords (声带) to make the full range of speech sounds. None of our closest relatives, the great apes, have developed such control—but whistling may be an easier first step.
1. Why are whistled languages developed in rough regions?A.Whistled speech travels much farther. |
B.Ancient people have different vocal cords. |
C.Whistled languages pack more information. |
D.People living there are gifted in whistling. |
A.They possess a wider vocabulary. |
B.They have a relatively higher pitch. |
C.Their pitch is irrelevant to meaning. |
D.Their range of application is limited. |
A.They are easy to understand. |
B.They deliver more information. |
C.They are widely used in our closest relatives. |
D.They have something in common with early languages. |
A.Speaking in Whistles | B.Developing a Whistled Language |
C.What Do Whistles Teach? | D.Why Should People Whistle? |