As the world witnesses more and more extreme weather patterns, it is becoming     1     (increasing) difficult to ignore the effects of climate change on our planet. It is now a common topic of discussion and has even found     2     (it) way into the books we read. As a result of this, a literary genre (体裁)     3     (refer) to as climate fiction, or cli-fi, has found new life.

The term “cli-fi”     4     (use) for the first time in 2007 by US climate activist and writer Dan Bloom. He intended to make “climate fiction” more appealing. According to Bloom, the term really gained     5     (popular) when Canadian writer Margaret Atwood used it on     6     Internet, introducing it to her half-a-million followers.

Just     7     the name suggests, climate fiction refers to stories with the central theme of climate change or global warming. These kinds of books can inspire the readers     8     (imagine) what the world might be like in the future because of major climate change events.

The genre is quite welcome among college students because it usually looks at topics that is relevant     9     what is really happening today. Cli-fi has also helped to motivate students to pursue science majors, with some universities even     10     (offer) courses specially focusing on climate fiction.

5 . Part of the reason American shoppers are so attracted to wholesale shopping is their belief that it not only prevents waste but can save time and money, providing more value for the dollar. However, recent research suggests that the opposite may be true.

Victoria Ligon, an expert on consumer sciences, studied food purchasing habits of consumers and found that people tended to buy too much food and waste more of it than they realized. “The problem is that people are not shopping frequently enough,” Ligon said, “People are very price sensitive at the grocery store, but tend to fail to notice the cost of unused and wasted food at home.”

A common practice is to visit different stores for different items on a grocery list, “But people tend to overbuy at each of the places,” Ligon said. “People are not planning for the next day, but planning for the next week or two.”

“In theory, planning a week or more in advance sounds ideal. But given the reality of many people’s lives, this is challenging to do well,” Ligon said. “All of our food promotions are designed to get people to buy more. We believe it’s cheaper if we buy more now, but we rarely take into account how much we throw out in the end.”

Ligon noted shifts in the grocery industry that appear promising to help customers reduce food waste. Examples include cost-effective delivery services such as Amazon Fresh and Google Express, which allow consumers to purchase food items when they want to consume them, also reducing their need to frequent so many different stores. However, the study resulted in another troubling finding: The majority of people involved in the study had no idea that they were buying too much and wasting so much.

“When you read advice about reducing waste, it usually centers on what people do after the food is purchased,” Ligon said. “But more importantly, shop on a more frequent basis, so that you are only buying what you are going to consume in the short term.”

7 . Mutual cooperation in which humans cooperate with wild animals is extremely rare. One such system involves the greater honeyguide, a small African bird that leads humans to sources of honey. Once a nest is found, the human honey hunters break into it to obtain honey and bee worms, and the birds benefit from consuming beeswax in the now-exposed honey comb. Both the birds and the humans use specialized sounds to communicate their availability to participate in this cooperative interaction.

The two areas studied by Spottiswoode and Wood are northern Mozambique, where the honey hunters are from the Yao cultural group, and northern Tanzania, where the honey hunters are from the Hadza culture. The Yao communicate with honeyguides using a short and high-pitched sound followed by a low sound “brrrrhm”, whereas the Hadza use a melodic whistle. Thus, signal and response both vary geographically.

Spotiswoode and Wood propose that the geographic variation they have identified in this mutualism is the product of cultural codevelopment. To qualify as cultural, the cooperative behaviors would have to be acquired through social learning from individuals of the same species. Social learning, however, is less of a given on the honeyguide side. Instead, what is required of honeyguides is another form of vocal learning—comprehension learning—in which the meaning of a signal is learned. Comprehension learning is common in birds. Whether social learning is involved, however, is not so obvious.

Honeyguides put in considerable effort helping their human partners find food and are faithfully rewarded by being given food in return. In some human cultures, honey hunters purposefully leave out honeycomb to reward honeyeaters, but in others the hunters go, to great length to deny the birds any reward, by collecting, burying, or burning any honeycomb exposed when they destroy a nest. The reason given for these act s is that keeping the birds hungry causes them to continue guiding.

A promising question for future research is whether geographic differences in human cultural preferences for rewarding or not rewarding honeyguides affect the preferences of individual birds for guiding versus taking advantage of the guiding of others.

8 . A new study has found the amount of antibiotics (抗生素) given to farm animals is expected to increase by two-thirds over the next 15 years. Researchers are linking the growing dependence on the drugs to the increasing need for meat, milk and eggs. However, the drugs could quicken the development of antibiotic-resistant infections (感染). Such infections are already a major public health concern in the United States.

The World Health Organization notes that when people stop living in poverty (贫困), the first thing they want to do is eat better, rather than earn more money. For most people, that means their diet should contain more meat. With the rapid development of Asia, people there are eating nearly four times as much meat, milk and other milk products as they did 50 years ago.

To meet the need, farmers have put many animals into smaller spaces. As the animals are crowded together, the easiest way to deal with some of the problems of crowding is to give them antibiotics. It’s clear that antibiotics help animals stay healthy in a crowded environment and grow faster. But bacteria can develop resistance to the drugs gradually.

Nowadays, doctors find antibiotics that once worked against the infections no longer work. The bacteria have learned ways to fight against the drugs. The heavy use of antibiotics in animals is responsible for the growth of antibiotic resistance worldwide. In the United States, at least two million people get drug-resistant infections each year and at least 23,000 die from an infection.

Europe has banned the use of antibiotics to increase animal growth. And the United States is hoping to persuade farmers to stop using antibiotics for that purpose.

10 . Every order of takeout comes with a side of single-use plastics and each plastic fork. knife, spoon and straw-whether or not you wanted it or used it-ends up in the trash.

New research found that 139 million metric tons of single-use plastic waste was generated in 2021-six million metric tons more single-use plastics compared to 2019. A hunger for takeout meals during the pandemic contributed to the surge.

An estimated 60% of Americans order takeout or delivery at least once a week and online ordering is growing 300% faster than in-house dining; that means millions of single-use plastic utensils (餐具) are going out with every order.

New laws aim to address the problem. Some of the recent bills are thanks to The National Reuse Network, part of the environmental nonprofit Upstream, which launched a national Skip the Stuff campaign to work out policies that require restaurants to include single-use plastic utensils, straws, and napkins only when customers request them.

The bills also require meal delivery and online apps like Uber Eats, GrubHub and Door Dash to add single-use extras to their menus; customers can choose the items and quantities to have them included in the order. Customers that don’t order the single-use plastics won’t receive them. The goal of the bills is to reduce the 40 billion plastic utensils sent to the landfill (垃圾填埋场) every year.

“Most of the time, people are taking food home or to their offices where there are reusable utensils so these utensils wind up in a drawer or get thrown out,” says Alexis Goldsmith, national organizing director for a nationwide project Beyond Plastics. “Some people do need utensils, but for the most part, they’re not needed.”

To date, Skip the Stuff bills have been passed in several cities, including Denver, Washington, D.C. and Chicago, California and Washington state passed statewide bills that make single-use plastic “accessories” available with takeout orders only upon request.

Organizations like Upstream, Beyond plastics and NRDC have created toolkits to help additional communities launch their own Skip the Stuff campaigns.