优秀四级作文

As is shown in the table above, dramatic changes have taken place in family expenses in the City of Shanghai within two decades (from 1980 to 2000). The most obvious change is in the expense on food and clothing, which has dropped by 48%, while those on recreation, education, and healthcare have increased respectively by 5%, 16%, and 10%. Expenses on other things keep rising from 17% to 35%.

The statistics of rise and fall seem to exist in isolation but are in fact closely related to one another. The most likely factors accounting for these changes are as follows: development in economy is the fundamental one. The increased income results in the lowering percentage of food and clothing. That is to say, a small percentage of the total income is enough to cover food and clothing expenses.

Another factor lies in the development of people's concept. When people are well-fed and well-dressed, they begin to interest themselves in recreation and education.

Title: The Impact of Power Failure

Many cities suffer from severe power shortages, causing blackouts that disrupt daily life and work. This phenomenon has aroused widespread concern and triggered discussions about its root causes and potential solutions.

The primary cause of power failures is the lack of sufficient power generation capacity, exacerbated by rapid urbanization and industrialization. As cities grow in size and complexity, the demand for electricity outstrips the available supply. Additionally, aging electrical infrastructure and insufficient maintenance contribute to the problem, resulting in frequent power outages.

To address this issue, governments must invest in upgrading and maintaining existing power facilities, expanding generating capacity, and promoting energy conservation measures. Encouraging the use of renewable energy sources can also help alleviate the pressure on conventional power plants.

Title: The Importance of垃圾分类

Garbage classification is a byproduct of social and economic development and an essential manifestation of civilization. Sorting waste can promote resource utilization, reduce environmental pollution, and improve people's living standards.

There are four categories of waste: recyclable and reusable waste, kitchen waste, hazardous waste, and other waste. Recyclable and reusable waste includes paper, plastic, glass, and metal. Kitchen waste consists of fruit peels, vegetable leaves, and leftovers. Hazardous waste includes batteries, light bulbs, and electronic devices. Other waste comprises of items that do not belong to the preceding categories.

Individuals should be aware of the importance of garbage classification and participate actively in sorting their waste properly. This practice will contribute to environmental protection and sustainable development.