A special protective mask for PM25 developed by Chinese enterprises with independent intellectual property rights has been officially put on sale. Tested by the national authority, the PM25 microfiltration filter mask can effectively filter PM2.5 air particles, with a filtration effect of up to 99%.

The environmental protection department monitors that in 2010, more than one-third of the 113 key environmental protection cities across the country did not meet the air quality standards. In 2012, more than one-half of the 113 key environmental protection cities across the country did not meet air quality standards. Outdoor PM2.5 has become an important killer threatening human health. Experts said that outdoor exercise and sports in a haze day can also endanger health, and effective protective measures should be taken. Zhang Yingzeng, secretary general of the China Antibacterial Association, said that PM25 masks effectively fill the gap in outdoor protection against PM2.5.

A preparatory meeting of the 12th National People's Congress was held in Beijing. As a leading figure in the treatment of respiratory diseases in China, Zhong Nanshan, a representative of the National People's Congress and an academician of the Chinese Academy of Engineering, was surrounded by numerous media reporters as soon as he appeared. Regarding "what is the hazard of smog", Zhong Nanshan explained: "I am doing a serious investigation on this and I have also collected some data. The preliminary conclusion is that smog pollution will affect the human respiratory system, brain nervous system, cardiovascular system, etc. This is a threat, especially lung cancer. Therefore, this issue is very worthy of attention."