2 . After a year of severe drought, California has seen an abundance of rain since late autumn. Abby Wines, a ranger (护林员) at Death Valley National Park in southern California, predicted that the heavy rainfall would bring us the opportunity to witness one of nature’s most spectacular displays of color and life — a superbloom — in 2023.

A superbloom refers to a large amount of wildflower growth that exceeds the average level for a typical spring. It is actually a rare phenomenon that usually takes place in exceptionally wet winters. Seeds that may have slept in desert soil for years finally receive enough water to blossom in more abundant numbers than you would see in a typical year.

The sight of the superbloom is truly breathtaking. Fields of gold, orange, and purple flowers stretch as far as the eye can see, creating a blanket of colors that can be seen from space.

However, climate change makes the phenomenon increasingly rare. In the distant past, these blooms were often excellent and enormous. As development pushes farther out, more landscapes have been changed to agriculture, and as invasive plants outcompetes the native seedlings, many of California’s spring flower fields are disappearing. In addition, thousands of tourists sometimes step on the flowers and soil, which harms the plant’s ability to adapt and thrive.

Naomi Fraga, director of conservation at the California Botanic Garden, points out that in promoting these locations where massive blooms take place, there isn’t a lot of additional information about how these are actually very fragile (脆弱的) ecosystems. Instead of promoting and sharing specific locations, it’s important to educate the public about the fragility of the ecosystems and the importance of staying on trails which people are allowed to enter.

5 . Plastic is widely used and long-lasting, finding its way into every corner of our lives. But the very qualities that make plastic so useful also make it a huge problem. Cheap and disposable (一次性的), plastic has been a symbol of our throwaway culture. As a result, vast quantities of plastic pollute our world. A truckload of plastic enters the ocean every single minute and UK supermarkets produce 800, 000 tons every year. With production increasing, that’s set to rise.

The UK produces huge plastic waste per person, and a huge amount of it is sent to countries that aren’t equipped to deal with it. Greenpeace (绿色和平组织) investigators found British plastic waste being put and burned in Turkey — on the roadside, near waterways, and in the open air, and people nearby have reported serious health problems.

Bottles, pots, and food bowls are immediately obvious, but other types of plastic pollution can be harder to discern. When plastic breaks down, it doesn’t disappear. Instead, it gets smaller, creating tiny particles called microplastics. Even clothes made from man-made materials leave microplastic fibers when they’re washed.

Bits of plastic have been found in the oceans, on deserted islands, and even in Antarctica. Turtles, dolphins, and seabirds can be injured by large pieces of plastic. It can even be mistaken for food. Microplastics are just as damaging. Eaten by everything from microscopic zooplankton (浮游动物) to giant blue whales, they enter the food chain and carry harmful poisonous substances. Microplastics have even been found in human waste.

We’re just beginning to realize the scale of the problem. People around the world have come together to end plastic pollution, and it’s working. Greenpeace supporters have challenged Coca-Cola to use less plastic packaging, while countries like the UK have banned certain microplastics. Supermarkets are starting to talk about what they need to do. Most of them are trying hard to share their responsibility for reducing plastic waste.

Jaws, the 1975 film, tells the story of a great white shark that attacks s and kills swimmers. In the opening scene, a woman swimming at night in a dark sea     1    (pull) underwater suddenly. She surfaces, cries in fear, then disappears forever.

People have always been scared of sharks, but Jaws made things even     2    (bad). It made people     3    (frighten) of sharks, especially of the great white shark. Many people who saw the film started to believe that sharks were bad animals that     4    (eat) humans. Some people stopped swimming in the sea, afraid of the horrible creature from the film. Other people started fishing for sharks,     5    (kill) as many as they could. At that time, nobody cared if sharks were killed,     6    how many were killed. People just wanted them killed.

Jaws was     7    great success, attracting huge audiences and winning many awards. It strengthened people’s long-held idea of the great white shark     8    a dangerous animal.

    9    (fortunate), not everyone who watched the film Jaws became afraid of sharks-some became interested in understanding them. Today, as we learn more about sharks, more people than ever want to protect them from     10    (extinct).

9 . A recent report revealed that, in the US alone, 27 million tons of plastic ended up in landfills in 2018, but only 3.1 millon tons were recycled. Wordwide the numbers are similarly bad, with just 9% of plastic being recycled. The statistics are even worse for certain types of plastic. For example, out of 80,000 tons of polystyrene (聚苯乙烯) containers generated in the United States, only a small amount (less than 5,000 tons) was recycled.

Now, researchers at The University of Queensland and have found a species of wom with an appetite for polystyrene could be the key to plastic recycling on a mass scale. The superworm can eat through polystyrene, thanks to a bacterial enzyme (酶) in their gut. To study how superworms react to purely plastic food, researchers broke up l35 of the creatures into three teams: one was fed only wheat bran(麸皮), another was fed only plastics, and the third was given nothing.

“We found the bran-fed worms have been significantly healthier than the plastic-fed or starved worms, more than doubling their weight over the three weeks they have been monitored. Though the plastic-fed worms made less impressive gains, they still put on more weight than the starved worms,” Dr. Rinke said. “This suggests the worms can get energy from plastics, most likely with the help of their gut microbes.”

Researchers used a technique called me a genomics to find several encoded enzymes with the ability to degrade polystyrene. The long-term goal is to engineer enzymes to degrade plastic waste in recycling plants.

“Super worms are like mini recycling plants, eating the polystyrene and then feeding it to the bacteria in their gut” Dr. Rinke said. It’s hoped this bio-up cycling will promote plastic waste recycling and reduce landfills. Researchers said they aim to grow the gut bacteria in the lab and further test its ability to degrade polystyrene. Then they can look into how to upscale this process to a level required for an entire recycling plant