| Abstract from DBPedia | Dust is made of fine particles of solid matter. On Earth, it generally consists of particles in the atmosphere that come from various sources such as soil lifted by wind (an aeolian process), volcanic eruptions, and pollution. Dust in homes is composed of about 20–50% dead skin cells. The rest, and in offices, and other human environments is composed of small amounts of plant pollen, human hairs, animal fur, textile fibers, paper fibers, minerals from outdoor soil, burnt meteorite particles, and many other materials which may be found in the local environment.粉塵（ふんじん）とは、粉のように細かく気体中に浮遊する塵（ちり）状の固体の粒子。「塵」の字が常用漢字外であるため、法令では粉じんと書かれる。 国際標準化機構では「粒径が75μm未満の固形浮遊物」と定義されている。物の燃焼等に伴い発生するものは、煤煙（ばいえん）といい、このうち、いわゆるすすのことを煤塵（ばいじん）という。 (Source: http://dbpedia.org/resource/Dust) |
