2 . European shepherds (牧羊人) and ranchers (大牧场主) are taking the lead in forest fire prevention, by leading their animals to clear away underbrush that allows fires to grow too big, a new study shows.

In thinner forested areas, large herbivores (食草动物) were found in a study to be greatly effective in reducing forest fire risk. “In general terms, it is clear that wild and semi-wild herbivores like horses can reduce wildfire risk through their eating grass,” says Julia Rouet-Leduc, lead author of the study. “Such herbivores can be particularly effective in remote areas, where careful management can prevent wildfire and benefit wild nature in other ways.”

Smaller animals like goats and sheep are ideal for areas that lack natural predators (捕食者). There are no large predators in all of Italy, and without the risk of losing an expensive animal, the eating habits of these smaller animals kept on a farm make them perfect for clearing underbrush and things which larger herbivores can’t stomach.

But there were laws that prevent goats and sheep from entering woods in order to protect them. Since natural numbers of red deer, and other native herbivores have long since disappeared from European forests, the loss of sheep and goats meant that nothing prevented grass from spreading in forests, turning brushfires into dangerous disasters.

That’s why shepherds on Sardinia have written a letter to the Italian Ministry of Agriculture, asking not only to allow their animals to eat grass within the woods, but to create a restoration project of rural areas in Montiferru, where Italy’s worst wildfire in 40 years recently burned its way from the mountain tops to the sea.

Their plan is to bring in more shepherds to better control the fires, and encourage eco-tourism in the area, to incentivize the shepherds to stay. This is already seeing success through both private and public inspiring measures in Catalunya, Spain.

6 . For those in search of safe, non-medicine sleep aids (助手), sound machines are a popular choice. The National Sleep Foundation recently found that 5% of Americans sleep with a “sound conditioner”. It can be a fan, phone app, or other noise-producing machines.

Michael Grandner, director of the Sleep and Health Research Program at the University of Arizona, says a sound conditioner is a lifesaver if you live where loud nighttime noise is common. But even if your bedroom is very quiet, sound machines can still be helpful if you’re the type of person unsettled by a total absence of noise, or if you’re a light sleeper who wakes from even the softest sound.

Research supports the idea that a little background sound can help people fall asleep. For a study in the journal Sleep Medicine, the researchers asked sleepers to listen to recorded hospital sounds either with or without a white noise machine. They found that those who slept with the white noise machine were hardly affected by the hospital sounds, while others who slept without white noise were easily awakened.

There’s also so-called “pink noise” and “brown noise”, which can sound similar to white noise. “I don’t think there’s enough evidence yet to say one type is better than another,” says Michelle Drerup, a sleep psychologist at the Cleveland Clinic. “I know from talking with my patients that some people prefer natural sounds, like a rainstorm. But others don’t want a sound at all when they sleep,” she says. “It all comes down to the individual (个人).”

For some, the best sound might be none. “Biologically (生物学上), you don’t need this sound to sleep,” says Michael Grandner, “and if you use it every night, you can get so used to it that you can’t sleep without it.” Most sleep experts agree. “I wouldn’t suggest people use sound machines to sleep unless they’re reporting difficulties with outside noises,” an expert says.

7 . Joshua trees — some of the most unusual and famous plants of the American Southwest — have survived as a species for some 2.5 million years in the Mojave Desert. Now, they may face extinction due to climate change.

In a new study published in the journal Ecosphere, researchers and volunteer scientists surveyed nearly 4,000 trees in southern California’s Joshua Tree National Park to figure out where the oldest trees grew the best during historic periods of extreme heat and drought. Then, the researchers estimated (估算) how many of these Joshua safe areas would survive to the end of the century based on a range of climate change predictions.

The study authors found that if greenhouse gas emissions (排放物) are seriously limited and summer temperatures are limited to an increase of 5.4 degrees Fahrenheit, about 19% of the park’s Joshua tree habitat (栖息地) would survive after the year 2070. If no action is taken to reduce greenhouse gas emissions and summer temperatures rise by 9 degrees Fahrenheit or more, however, only 0.02% of the tree’s habitat would survive to the end of the century, leaving the tree close to extinction.

One way to save the Joshua trees from extinction is to reduce greenhouse gas emissions. However, even if the habitats survive, these trees will still be in danger because of wildfires, which have also been happening more often as the climate warms. According to the researchers, fewer than 10% of Joshua trees survive when wildfires rush through their habitats.

“Removing grass is a way park rangers (护林员) are helping to protect the area from fire today,” Sweet, a plant ecologist at the University of California, said. “By protecting the trees, they’re protecting a host of other native insects and animals that depend on them as well.”

8 . For the past 10 years I have been cycling on the Qinghai-Tibet Plateau. Every summer vacation, I spend a month biking across the plateau.

In 2014, I set out on a cycle route with five other people in the far west of the Tibet autonomous region. Our 2,000-kilometer route started in Lhasa in the east, passed through the northern part of the prefecture (辖区) and ended in the west.

Titled the “top of the Roof of the World”, the plateau, which has a small population, has incredible scenery. Travelers can see the snowy mountains, clean blue lakes, lots of animals during the day, and clear, starry skies at night.

The route consists of dirt, even broken stones and paths, which have been formed over time by passing vehicles. Animal attacks are a potential risk in the wild. One night, we had to camp near a forest where there were potential animal attacks, especially from wolves. We found a house in a locked yard, but no one answered our calls from the gate. It was the time of the seasonal migration, so maybe the people had moved to another place for better water and grass. Then we had to camp outside. One of us was very experienced and careful. He placed some hay bales (干草捆) alongside the wall and said that if something dangerous happened, we could use them to jump into the yard and shelter (躲避) in the house.

Luckily, we didn’t meet any wolves or other animals, though we could hear them calling. Animal attacks remain a major cause of injuries on that route. Before the trip, we read online that a traveler had been bitten by wolves. The temporary “step” our companion built made us feel safer.

9 . Avett Ray is a little boy with a disability. It may seem ______ for other kids. However, that’s not the case for Avett Ray. Actually , this six-year-old boy shows that he has a ______ far beyond kids of his age.

The young piano genius (天才) was born ______ . But he hasn’t been held back by the difficulty. Though he can’t see, he taught himself to play the piano by ear. He ______ this when he was less than two years old, which shocked his parents. Now he has a piano teacher to help him improve his ______ . His excellent performance _______people, so they invited him to perform. He _______. After all, he wants to influence others using his example , so he welcomes every _______.

Avett Ray is very ______ about spreading his music. In fact, he asked his mom to send his videos to Adele, a ______, so that he could ask her for some advice. It is her songs that ______ him, making him decide to do something good. He hopes to use his gift to make others accept and ______ people like him. Avett Ray’s mom even ______ a book called Cotton Candy Clouds to teach people how to show support for them. “Avett Ray is a character in the book, although he appears in a small part of the book,” his mom said. “ ______ , he couldn’t see clouds, so I wrote this book to let him see them. The book says everybody is made ______ and that we’re all born with our own gifts and can do something.”