Haze, a term that once seemed unusual five years ago, has now become a part of our daily lives. It appears without warning, and we often find ourselves unprepared for its arrival or departure. The issue of flood prevention—now commonly referred to as haze control—has become increasingly important. Effective strategies such as scientific methods, quality standards, and advanced technologies are essential in combating this challenge. These approaches can be considered as a series of "combination punches" that help in managing the problem. This report aims to introduce these techniques, raise awareness, and provide readers with useful insights and guidance.
The persistent poor air quality has made terms like "fog and haze" and "PM2.5" widely discussed. Products such as "haze masks" and "PM2.5 air purifiers" have gained popularity, leading to a surge in consumer demand. But how effective are these so-called "anti-haze tools"? Do they truly protect us from the invisible PM2.5 particles?
**Masks: Limited Protection**
Currently, there are no national or industry standards for haze masks in China, which makes it difficult to assess their true effectiveness. According to Lu Bing, director of the Jiangsu Special Security Products Quality Supervision and Inspection Center, recent risk monitoring found that many masks labeled as PM2.5 protective were not performing as expected. The tests, based on existing standards like GB2626-2006 and GB19083-2010, revealed that filtration efficiency was often below 90%, with some masks performing even worse. Su Hequn, a researcher at the center, emphasized that without proper standards, the results cannot be used to determine if a mask is truly effective. Consumers are advised to choose masks based on their specific needs.
**Air Purifiers: Unclear Performance**
Similarly, air purifiers marketed for PM2.5 removal have become popular. However, the lack of standardized testing methods makes it hard to evaluate their true performance. Li Long from the Jiangsu Metrology Center explained that while there are existing standards for air purifiers, none specifically address PM2.5 purification. A recent comparison test of 20 brands showed significant variation in efficiency, with the best model removing 99.56% of PM2.5 in 20 minutes, while the worst only reached 72.28%. Experts stress that these results are preliminary and do not reflect long-term performance or real-world conditions.
With no clear guidelines or testing procedures in place, the effectiveness of these products remains uncertain. Industry experts urge the development of comprehensive standards and reliable testing methods to ensure consumers receive accurate information and genuine protection. Until then, caution is advised when purchasing and using such products.
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