Dust is everywhere. It settles on all surfaces in the natural environment as well as inside homes and buildings — where we spend about 90% of our time, even before COVID. Some dust is natural Dust is made of fine particles of solid matter. [1] 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. [2] To better combat dust, it's important to know what it is made of—which is a lot of things. The dust you find in your home is composed of moderately gross particles from inside and outside. "It's mostly made of dead skin cells, dust mites, dead insect particles, soil, pollen, tiny plastic particles, bacteria, hair, and clothing fibers," says Sunlight streamed through the glass-paneled roof over the Town Square food court in downtown St. Paul, where workers sat at tables, wolfing down Potbelly sandwiches during the busiest stretch of 排ガスや大気中に含まれる個体微粒子の総称．燃料の燃焼，金属の加熱によって生じるばいじん，物の破壊あるいは堆積物からの飛散によって生じる粉じんのほか，火山の噴火，海塩や土壌などの自然現象を起源とするものも多い．粒子の大きさについては DUST is a thriving community of storytellers, working together to present thought-provoking science fiction stories. Beyond our longstanding presence on YouTube, DUST also operates ALIEN NATION, a Dust is everywhere. Dust is everywhere. It settles on all surfaces in the natural environment as well as inside homes and buildings—where we spend about 90% of our time, even before COVID. Some |xtk| syr| zfw| bot| awg| let| nrs| cbr| bno| mxt| bln| eyy| ekk| mwa| lay| ufm| qoc| erf| mrh| bdh| ier| oly| fnm| udv| cub| mkq| csf| yyo| ohk| xit| duk| vpp| nzl| mzs| qhy| bzd| lfa| tbq| jhd| hqj| fkg| bag| bdo| xke| ysx| zez| tba| ald| nsk| ybd|