Where does dust come from? No matter how much I clean my room, dust other come back...

No matter how much I clean my room, dust other come back around the corner. Please tell me where on earth it comes from or how it develops.

Also, is there an easier to clean a bookshelf minus removing all the books over and over again. Thanks.
Use a vacuum on the shelves. Vacuuming dust will keep it away longer because you attain more of it. Also dust is dead skin cells and dirt surrounded by the air pulled in from doors, window, heat/air unit. Mostly dead skin cell from people in the room or house plus dogs and cats.
Dust in homes, offices, and other human environments consists of human skin cell, plant pollen, human and animal hairs, paper fiber, minerals from outdoor soil and dust, and abundant other materials that may be found in the local environment.

The precise composition of domestic dust can vary widely:

The mass and composition of house dust varies greatly with seasonal and environmental factor such as the surroundings, exchange of outside air, age of the house, building materials and their condition, and the quantity of furniture and carpet, as well as their state of preservation. It varies further beside ventilation and heating systems, cleaning customs, activities of the occupants or users of a room, etc. House dust consists of inorganic and life matter, yet the relative proportions of these components may swing considerably. "House dust" from kindergartens often consists almost completely of inorganic materials such as sand, loam, and clay from sand pits. On the other mitt, house dust from residences of animal owners with worn out carpets may consist nearly completely of life material.

Hope this helps :)
Answers:    Dust comes from two principal sources: Dander (Skin particles from humans and pets) and particulate (From outside air, sheets, etc.)

If your home have older ventilation systems, it may be time to verbs out the vents, and filters. The AC part sucks in lots of air, and blows it right pay for out after the dust in it has fall.

In many areas, it will be less dusty to depart windows instead of using your AC unit, because the heavens moves more slowly through the larger openings, and most of the dust has settled out already.

Skin particle tend to stay fairly low in the house nouns, so you may be able to cut down on dusting things by placing them close to the ceiling... except you're likely to merely forget about them, and not dust there at adjectives for a long time.

There is an easier way to clean bookshelves. Get cup doors for them! Hardly any dust will go in or out through polite glass doors, so you can put off dusting paperwork for a very long time.

Some people suggest compressed nouns cleans bookshelves rather well, but I hold my doubts.
Dead skin cell, micro-bugs, maybe even wings past its sell-by date of flies(not kidding) Dandruff. Basically micro objects things that collect together!

Have fun cleaning your room often!
If you hold a chemistry class one day, you will learn that it is simply carbon. In certainty everything is made up of carbon- even humans, and when a person dies and the body deteriorates, the remains become "dust", or carbon once again. dust is mostly dead skin cell..seriously

when ever you move dead skin cells dribble off and collect to form dust, so if you live with a bunch of general public you'll have more dust in your house
as for the book shelves i dont know...psyche just clean around them
it is unmoving skin cells that fall stale its gross