综合一区欧美国产,99国产麻豆免费精品,九九精品黄色录像,亚洲激情青青草,久久亚洲熟妇熟,中文字幕av在线播放,国产一区二区卡,九九久久国产精品,久久精品视频免费

USEUROPEAFRICAASIA 中文雙語Fran?ais
Lifestyle
Home / Lifestyle / Health

Living with smog

By Liu Zhihua | China Daily | Updated: 2014-03-19 07:39

The material, structure and the method of wearing a mask are important, according to Li Guimei, the secretary-general of China Nonwovens and Industrial Textiles

Living with smog

China's teachers count most 'zzz's 

Living with smog

Good sleep may boost brain function: Study 

Association.

Ordinary cotton face masks are not designed to trap PM2.5, even though they can block large particles, says Li at an air-pollution protection forum held in Beijing in February.

Besides, as the domestic mask market is still developing, there is no nationwide official criteria and regulation on the categorization and use of different masks. As a result, many of the mask sellers claim their products are able to protect people from PM2.5. But they are made of materials that do not block PM2.5, or do not fit and seal the nostril and mouth areas, Li says.

Masks made of special materials - not just cotton - that have been confirmed to be able to block PM2.5, seal around the face tightly and do not have very big respiratory resistance are the best, Li adds.

As for air purifiers, sales increase in pace with growing awareness of PM2.5, but consumers may become confused on how to choose among so many brands and types, especially when there is no official criteria and testing method on an air purifier's ability to remove PM2.5 in the air, according to Wu Jixiang, an expert with Shanghai Jiaotong University.

A non-governmental consumer-rights protection organization in Shanghai reported in 2013 that almost all the air purifiers it tested exaggerated their ability to remove PM2.5, Wu adds.

Wu suggests customers seek advice from trustworthy professionals when choosing an air purifier, or use a hand-held PM2.5 measuring device to measure the efficiency of the machine. It is also important to follow the instruction of the user's guide to make good use of an air purifier, Wu adds.

Xu Qiong, the Beijing resident, says depending on masks and air purifiers to protect against air pollution are not long-term solutions. Instead, the government should take efficient action to clean the air as soon as possible.

Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
当涂县| 易门县| 西峡县| 德江县| 肇东市| 江门市| 宝鸡市| 高邑县| 扶绥县| 池州市| 泰安市| 东港市| 元阳县| 达拉特旗| 邵阳县| 娱乐| 林周县| 崇仁县| 鲁山县| 临湘市| 宁远县| 汨罗市| 舞阳县| 天长市| 鸡东县| 吉林市| 陈巴尔虎旗| 明星| 牟定县| 湖北省| 乐昌市| 兴和县| 永胜县| 连云港市| 津南区| 平潭县| 南靖县| 西乌珠穆沁旗| 盐亭县| 鲁山县| 宁安市|