In september , the ministry of environmental protection said it planned to amend the nation 's air quality standards to include the smallest particulates , although it has not released a timetable for adopting the new standards .
Unlike the american embassy readings , chinese environmental officials do not publicly release data on the smallest particulates , those less than 2.5 micrometers , which scientists say are most harmful because they are able to penetrate the lungs so deeply .
One theory is that a growing mass of particulates , such as coal dust and biomass ( from the widespread use of cow dung as fuel , for instance ) in the air above india , now hinders rainfall .
Particulates in the air from motor vehicles can accumulate and damage works of art .
机动车辆排放的微粒物质会让艺术作品堆积灰尘,遭到毁坏。
So have the high volume of particulates and gases inhaled by firefighters , said prezant .
因此,消防员们吸入了大量的这种微粒和气体,prezant说。
These particulates are seen as the most hazardous as they are small enough to enter the bloodstream and damage lung tissue .
这些微粒被视为危害最大,因为它们足够微小,能够进入血液,损伤肺组织。
Other options include cleaning exhaust gases before they are released using scrubbers . These act as a filter in smokestacks that capture particulates , corbett says .