2026年10月17日（土）の要約問題2026年10月17日（土）の問題もんだい

In many towns, small shops are beginning to accept cashless payments. Customers can pay with a card or a phone instead of carrying coins and bills. This change became more common as people started using shopping apps and digital payment services. Some shop owners hope it will help them serve customers more easily, especially during busy hours.

One benefit is that cashless payments can make shopping faster. Workers do not need to count as much change, so they may spend more time helping customers. Digital records also make it easier for shop owners to check daily sales and manage their money. In addition, customers may feel safer because they do not need to carry a large amount of cash.

However, there are some concerns about relying on digital payments. A shop may be unable to accept payment if its internet connection or payment system stops working. Some older people may also find it difficult to use payment apps, and not everyone has a smartphone or bank card. Shops need to keep other ways to pay available so that all customers can buy what they need.

Urbanization is often associated with crowded streets and expanding suburbs, but a less visible change is taking place after dark. As cities grow, some local governments are redesigning neighborhoods so that homes, workplaces, shops, and public services remain active throughout the day and night. This approach, sometimes called the “24-hour city,” is intended to make better use of urban space rather than simply accommodate more residents.

One benefit is that round-the-clock districts can support public transportation and local businesses for longer periods, making existing infrastructure more efficient. Residents may also gain easier access to services and employment opportunities, including jobs with flexible schedules, while activity in public spaces can create a stronger sense of safety. In this way, urban growth may improve convenience and economic resilience without requiring cities to expand their boundaries.

However, there are concerns about who benefits from this continuous activity and who bears its costs. Nighttime noise, bright lighting, and irregular work hours can harm sleep and psychological well-being, particularly for people living near busy areas or working with limited control over their schedules. Moreover, rising demand for central housing may displace lower-income residents, even as officials describe the development as sustainable. Cities therefore need to balance economic activity with residents’ health, affordability, and right to rest.

Genetic engineering is increasingly being applied not only to crops and medicines but also to the living communities in soil. Researchers are modifying microorganisms so they can perform particular tasks, such as helping plants absorb nutrients or breaking down pollutants. This approach, sometimes described as engineering the soil microbiome, reflects a shift from treating land as an inert resource to viewing it as an intricate biological system that can be deliberately redesigned. Its promise is especially appealing as agriculture faces pressure to produce more food while reducing its reliance on chemical inputs.

One benefit is that engineered microbes could make farming more efficient and less damaging to the environment. By improving nutrient uptake, they may allow crops to grow with smaller quantities of fertilizer, lowering both farmers’ expenses and runoff into waterways. Other modified organisms could help restore contaminated land, offering a targeted alternative to costly excavation or broad chemical treatment. In principle, these microscopic interventions could function like a living infrastructure: once established, they might support plant health and soil recovery with relatively little ongoing input.

However, there are significant uncertainties about releasing designed organisms into open ecosystems. Soil communities are complex, and a microbe that behaves predictably in a laboratory may interact differently with local species, spread beyond its intended area, or transfer engineered traits to other organisms. Such changes could be difficult to reverse, while monitoring them across vast agricultural regions would be expensive and technically challenging. There are also questions about who controls the technology and bears responsibility if it causes harm, particularly when small farmers depend on products developed by large companies. Careful testing, transparent oversight, and long-term ecological monitoring are therefore essential before engineered microbes become a routine feature of farming.