考研英语表格范文与高分写作攻略

As is clearly reflected in the table above, the air quality in Chinese cities varied significantly in 2013. The table lists the AQI and the percentage of days meeting the national standard for several major cities. For instance, Beijing had an AQI of 84, with 58.6% of days meeting the standard, while Guangzhou showed a better performance with an AQI of 52 and 78.4% of qualified days. In contrast, some cities like Shijiazhuang had a high AQI of 115, indicating severe pollution. There are several reasons behind this disparity. First, geographical location plays a crucial role. Cities in the north, such as Beijing, are more prone to dust and smog due to their climate and topography. Second, industrial activities and vehicle emissions are major contributors to air pollution. Cities with heavy industries tend to have worse air quality. In conclusion, improving air quality remains a challenging task. It is imperative for the government to enforce stricter environmental regulations and for citizens to adopt a low-carbon lifestyle.