air quality index

简明释义

大气质量指数;

英英释义

例句

1.The government issues alerts when the air quality index reaches hazardous levels.

当空气质量指数达到危险水平时，政府会发布警报。

2.On days when the air quality index is high, it's advisable to stay indoors.

在空气质量指数较高的日子里，建议待在室内。

3.Before going for a run, I always check the air quality index to ensure it's safe to exercise outside.

在去跑步之前，我总是查看空气质量指数，以确保在外面锻炼是安全的。

4.Many apps provide real-time updates on the air quality index for your area.

许多应用程序提供您所在地区的空气质量指数实时更新。

5.The air quality index in our city has improved significantly over the past few years.

我们城市的空气质量指数在过去几年中有了显著改善。

作文

The importance of monitoring the environment cannot be overstated, especially when it comes to air quality. One of the most crucial tools for assessing air pollution levels is the air quality index. The air quality index (AQI) is a standardized system used to communicate how polluted the air currently is or how polluted it is forecast to become. It provides information on the potential health effects that may be associated with different levels of air pollution.Understanding the air quality index is essential for everyone, as it helps individuals make informed decisions about outdoor activities. The AQI is typically divided into categories that range from 'Good' to 'Hazardous'. These categories are determined by measuring the concentration of various pollutants in the air, including particulate matter (PM10 and PM2.5), ground-level ozone (O3), carbon monoxide (CO), sulfur dioxide (SO2), and nitrogen dioxide (NO2).For instance, when the AQI is in the 'Good' category, which ranges from 0 to 50, air quality is considered satisfactory, and air pollution poses little or no risk. However, as the index rises, so does the potential for health effects. When the AQI falls between 51 and 100, it is classified as 'Moderate', indicating that air quality is acceptable; however, there may be some concerns for a very small number of people who are unusually sensitive to air pollution.As the AQI continues to increase, reaching levels between 101 and 150, it enters the 'Unhealthy for Sensitive Groups' category. This means that while the general public is not likely to be affected, individuals with respiratory or heart conditions, children, and older adults may experience health effects. When the AQI exceeds 150, it is classified as 'Unhealthy', where everyone may begin to experience health effects, and members of sensitive groups may experience more serious health effects.The highest levels of concern are represented by the 'Very Unhealthy' and 'Hazardous' categories, which occur when the AQI is above 200. In these cases, the entire population is likely to be affected, and everyone should take precautions to minimize exposure to polluted air.Monitoring the air quality index is particularly vital in urban areas where pollution levels can fluctuate significantly due to traffic, industrial activities, and other human factors. Governments and environmental agencies often provide real-time updates on the AQI through various platforms, including websites, mobile apps, and social media. This accessibility allows people to stay informed and adjust their plans accordingly.In addition to individual awareness, understanding the air quality index is crucial for policymakers and city planners. By analyzing AQI data, they can implement strategies to improve air quality, such as promoting public transportation, enhancing green spaces, and regulating emissions from industries. Furthermore, educating the public about the implications of the AQI can foster community involvement in advocating for cleaner air initiatives.In conclusion, the air quality index serves as a vital indicator of air pollution levels and their potential health impacts. By staying informed about the AQI, individuals can protect their health and contribute to collective efforts aimed at improving air quality. As we continue to face challenges related to pollution and climate change, understanding and utilizing the air quality index will be more important than ever. It empowers us to take action, whether that means staying indoors on a bad air day or supporting policies that aim for a cleaner environment.

监测环境的重要性不容小觑，特别是在空气质量方面。评估空气污染水平的最重要工具之一是空气质量指数。空气质量指数（AQI）是一种标准化系统，用于传达当前空气污染程度或预测空气污染程度。它提供有关与不同空气污染水平相关的潜在健康影响的信息。理解空气质量指数对每个人来说都至关重要，因为它帮助个人就户外活动做出明智的决定。AQI通常分为从“良好”到“危险”的类别。这些类别是通过测量空气中各种污染物的浓度来确定的，包括颗粒物（PM10和PM2.5）、地面臭氧（O3）、一氧化碳（CO）、二氧化硫（SO2）和二氧化氮（NO2）。例如，当AQI处于“良好”类别时，范围为0到50，空气质量被认为是令人满意的，空气污染对健康构成的风险很小。然而，随着指数的上升，健康影响的潜力也随之增加。当AQI在51到100之间时，被归类为“适中”，表示空气质量是可以接受的；然而，对于一些对空气污染特别敏感的人可能会有一些担忧。随着AQI继续上升，达到101到150之间，它进入“对敏感人群不健康”类别。这意味着虽然公众不太可能受到影响，但患有呼吸道或心脏疾病的人、儿童和老年人可能会经历健康影响。当AQI超过150时，被归类为“不健康”，这时每个人可能开始经历健康影响，而敏感人群可能会经历更严重的健康影响。关注“非常不健康”和“危险”类别的最高关注水平，即AQI超过200。在这些情况下，整个社会可能会受到影响，每个人都应采取预防措施以减少对污染空气的暴露。监测空气质量指数在城市地区尤其重要，因为由于交通、工业活动和其他人为因素，污染水平可能会显著波动。政府和环保机构通常通过各种平台提供AQI的实时更新，包括网站、移动应用程序和社交媒体。这种可及性使人们能够保持信息灵通，并相应调整计划。除了个人意识，理解空气质量指数对政策制定者和城市规划者至关重要。通过分析AQI数据，他们可以实施改善空气质量的策略，例如促进公共交通、增强绿地和监管工业排放。此外，教育公众有关AQI的影响可以促进社区参与倡导更清洁空气的举措。总之，空气质量指数作为空气污染水平及其潜在健康影响的重要指标。通过了解AQI，个人可以保护自己的健康并为改善空气质量的集体努力做出贡献。随着我们继续面临与污染和气候变化相关的挑战，理解和利用空气质量指数将变得比以往任何时候都更加重要。它赋予我们采取行动的能力，无论是意味着在空气质量不佳的日子呆在室内，还是支持旨在创造更清洁环境的政策。