Đề ôn thi Đề thi vào lớp 10 Trường Phổ thông Năng khiếu môn Tiếng Anh - Mã đề PTNK-37

Every day, we throw away tons of paper, but have you ever considered where it could go instead of a landfill? The process of turning old newspapers into cellulose insulation is a (21) __________ example of this principle. This transformation not only reduces waste but also creates a valuable product used in building homes. It is a clear demonstration of how recycling can turn one item into something completely different and useful.

The process begins when large quantities of old newspapers are collected from recycling centers. Before they can be used, they must be sorted to remove any glossy paper or plastic items. Once sorted, the paper is fed into special machines that shred it into very small, fine pieces. The paper must undergo this initial breakdown to create the base material for the insulation.

(22) __________ converts the paper from a simple sheet into a fluffy, fibrous material. Next, the shredded paper is treated with non-toxic chemicals, most commonly boric acid. This is a crucial step in order to make the final product a fire retardant, which means it helps to prevent the spread of fire. Not only is the material treated for safety, but it also becomes more resistant to pests and mold.

After the chemical treatment, the damp mixture is dried. This step is carefully controlled to ensure the insulation has the right density and texture. The end result is a loose-fill material that is light and (23) __________ as an insulator. Because of its eco-friendly origins and performance, it is often considered one of the (24) __________ sustainable insulation options available on the market.

In conclusion, the journey from a discarded newspaper to high-performance building insulation is a remarkable example of modern recycling. It takes a product that has served its purpose and gives it a new, long-lasting life, helping to make our homes more energy-efficient and environmentally friendly.

The bustling rhythm of city life often comes with an unseen, yet pervasive, environmental challenge: noise pollution. Far more than just an annoyance, this constant assault of unwanted sounds is increasingly recognized globally as a significant public health issue. From the roar of traffic to the incessant hum of construction sites and the blare of loudspeakers, urban centers worldwide grapple with excessive noise levels. Unlike other forms of pollution, noise often goes unnoticed as a serious threat, yet its impact on our well-being can be just as profound, silently eroding our quality of life.

In Vietnamese cities, this issue resonates deeply, forming an inescapable part of daily existence. The cacophony of vehicle horns, a frequent and often unregulated practice, combined with ubiquitous promotional loudspeakers, creates a constant, high-decibel backdrop. Whether navigating busy streets or simply trying to relax at home, residents are routinely exposed to sound levels that exceed comfortable limits. This relentless sonic environment, while perhaps normalized for many, highlights a specific challenge requiring localized solutions and greater public awareness to mitigate its widespread effects.

But why should a 14-15 year old care about the constant drone of traffic or the blare of a loudspeaker? [I] This invisible form of pollution can severely affect your ability to concentrate, especially during study time or while trying to focus in class. Beyond just distraction, continuous exposure to high noise levels can elevate stress hormones, disrupt sleep patterns, and even contribute to increased anxiety. For young minds, an environment rich in unwanted noise hinders learning and can make it harder to thrive.

Recognizing the escalating problem, many urban areas, including those in Vietnam, are implementing measures to curb noise pollution. [II] In Vietnam, for instance, regulations like Decree 100/2019/ND-CP penalize the misuse of vehicle horns, aiming to bring order to the chaotic soundscape. Beyond specific laws, broader urban planning strategies, such as creating green buffer zones, promoting quieter transportation options, and enforcing stricter construction noise limits, are crucial. While challenging in dense cities, these efforts are vital steps towards creating more serene and livable environments for everyone.

Ultimately, understanding noise pollution means recognizing it as more than just background annoyance; it's a silent threat to our collective health and well-being. For young people, being aware of how daily noise exposure affects concentration, stress, and sleep is the first step towards advocating for change. [III] By supporting efforts to reduce unnecessary noise and understanding its impact, we can all contribute to fostering quieter, healthier urban spaces. The goal is not silence, but a balanced soundscape promoting a better quality of life for all, paving the way for a calmer, more focused future. [IV]