question: Why do homes get dusty over time?
comment: Most domestic dust is dead skin particles, together with hair, pollen, textile fragments, and atmospheric dust (depending on local environment could be wind blown soil, volcanic ash, particles from vehicle or industrial exhausts, etc).
passages: Buildings constantly evolve as a result of the changes in the environment around them as well as the occupants, materials, and activities within them. The various surfaces and the air inside a building are constantly interacting, and this interaction results in changes in each. For example, we may see a window as changing slightly over time as it becomes dirty, then is cleaned, accumulates dirt again, is cleaned again, and so on through its life. In fact, the “dirt” we see may be evolving as a result of the interactions among the moisture, chemicals, and biological materials found there.
   Often, people wear an item of clothing until it falls apart. Some materials present problems. Cleaning leather is difficult, and bark cloth (tapa) cannot be washed without dissolving it. Owners may patch tears and rips, and brush off surface dirt, but materials like these inevitably age.
  
  However, most clothing consists of cloth, and most cloth can be laundered and mended (patching, darning, but compare felt).
  
  Section::::Life cycle.:Laundry, ironing, storage.
   Section::::Early life.
   Over time dust accumulates on household surfaces. As well as making the surfaces dirty, when dust is disturbed it can become suspended in the air, causing sneezing and breathing trouble. It can also transfer from furniture to clothing, making it unclean. Various tools have been invented for dust removal: Feather and lamb's wool dusters, cotton and polyester dust cloths, furniture spray, disposable paper "dust cloths", dust mops for smooth floors and vacuum cleaners. Vacuum cleaners often have a variety of tools to enable them to remove dirt not just from carpets and rugs, but also from hard surfaces and upholstery. Dusting is very important in hospital environments.
   Section::::Career.
   When a house is cleared there are many costs associated with the job and vary depending on the items cleared. Many councils across the UK operate a strict policy which must be adhered to.
  
  Example items. These have to be cleared in a safe way.
  
  BULLET::::- asbestos
  
  BULLET::::- pesticides
  
  BULLET::::- fluorescent tubes
  
  BULLET::::- oils
  
  BULLET::::- some paints
  
  BULLET::::- some household and car batteries
  
  BULLET::::- discarded electrical equipment like TVs and computer monitors, fridges and freezers
  
  BULLET::::- discarded energy saving light bulbs (also known as CFLs)
  
  BULLET::::- mattresses
  
  BULLET::::- plasterboard
  
  BULLET::::- car tyres
   The final section of the show has Aggie and Kim unveiling the freshly cleaned home to the resident. In earlier episodes, Kim and Aggie would return to the home several weeks later to see if the cleaning was being maintained.
   Organic chemicals are widely used as ingredients in household products. Paints, varnishes, and wax all contain organic solvents, as do many cleaning, disinfecting, cosmetic, degreasing, and hobby products. Fuels are made up of organic chemicals. All of these products can release organic compounds during usage, and, to some degree, when they are stored. Testing emissions from building materials used indoors has become increasingly common for floor coverings, paints, and many other important indoor building materials and finishes.
   When a home is sold, inspections are performed that may reveal environmental hazards such as radon gas in the basement or water supply or friable asbestos materials (both of which can cause lung cancer), peeling or disturbed lead paint (a risk to children and pregnant women), in-ground heating oil tanks that may contaminate ground water, or mold that can cause problems for those with asthma or allergies. Typically the buyer or mortgage lender will require these conditions to be repaired before allowing the purchase to close. An entire industry of environmental remediation contractors has developed to help home owners resolve these types of problems.
   Areas with dry or desert climates, especially when combined with high winds, have more severe problems of fugitive dust. Dry and disturbed surfaces can release wind-borne fugitive dust for many months before there is sufficient rainfall to coagulate the soil. Surfaces susceptible to fugitive dust emissions are both natural and man-made.
  
  Specific sources include open fields and parking lots, paved and unpaved roads, agricultural fields, construction sites, unenclosed storage piles, and material transfer systems.
   There are four main environmental agents of deterioration which should be monitored on a regular basis as part of maintenance. These are temperature, relative humidity, light and dust. It is important to recognize the type of damage each agent may present as well as ways to mitigate any harm.
  
  Section::::Environmental Control.:Temperature.
   Older surfaces, such as double jute-backed carpets and loose rugs with natural foundation yarns, could shrink after a wet treatment, leading to suppositions that wet-cleaning could also remove wrinkles. However, this notion is antiquated and this method could also occasionally tear seams or uproot strips. Newer carpets, such as with synthetic backing and foundation yarns, do not shrink, and they smooth easily; in such carpets, wrinkles indicate an underlying problem, such as delamination where the secondary backing becomes unstuck from the primary backing, that may need a certified carpet inspector to determine.
   Plants also appear to reduce airborne microbes and molds, and to increase humidity. However, the increased humidity can itself lead to increased levels of mold and even VOCs.
   Over time, rubber-insulated cables become brittle because of exposure to atmospheric oxygen, so they must be handled with care and are usually replaced during renovations. When switches, socket outlets or light fixtures are replaced, the mere act of tightening connections may cause hardened insulation to flake off the conductors. Rubber insulation further inside the cable often is in better condition than the insulation exposed at connections, due to reduced exposure to oxygen.
   Dirt
  
  Dirt is unclean matter, especially when in contact with a person's clothes, skin or possessions. In such case they are said to become dirty. Common types of dirt include:
  
  BULLET::::- Dust: a general powder of organic or mineral matter
  
  BULLET::::- Filth: foul matter such as excrement
  
  BULLET::::- Grime: a black, ingrained dust such as soot
  
  BULLET::::- Soil: the mix of clay, sand, and humus which lies on top of bedrock
  
  Section::::Exhibitions and studies.
   In a commercial setting, a dirty appearance gives a bad impression. An example of such a place is a restaurant. The dirt in such cases may be classified as temporary, permanent, and deliberate. Temporary dirt is streaks and detritus that may be removed by ordinary daily cleaning. Permanent dirt is ingrained stains or physical damage to an object, which require major renovation to remove. Deliberate dirt is that which results from design decisions such as decor in dirty orange or grunge styling.
  
  Section::::Disposal.
   Keratolysis exfoliativa normally appears during warm weather. Due to excessive sweating and friction, in for example athletic shoes, the skin can start to exfoliate. Other factors that can cause exfoliation are detergents and solvents.
  
  Another very common cause has been reported from salt water fishermen, who often suffer from these symptoms. It is not sure whether it is from the salt water or whether it is from some bacteria from fish.
  
  Section::::Treatment.
   poemThe rag that wears its dirt so plainly is 
  
  for you. Such dull demeanor speaks the tongue
  
  of filthy truth. The coffee stains, the rank
  
  smell tells you something permanent occurred.
  
  The acts and words you can’t undo don’t vanish
  
  but they grow old, get darker, start to rot.
  
  Right now just see and feel those foul clichés’
  
  unpleasant stench. The cloth is worn, has lost 
  
  its shape, has been abused. But don’t reject
  
  the crusted blood and dust and lead that hang
  
  a weary head because they can’t depart.
  
  Just let them stay awhile beneath the rain,
   Dust
  
  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, dust lifted by wind (an aeolian process), volcanic eruptions, and pollution. Dust in homes, offices, and other human environments contains small amounts of plant pollen, human and animal hairs, textile fibers, paper fibers, minerals from outdoor soil, human skin cells, burnt meteorite particles, and many other materials which may be found in the local environment.
  
  Section::::Dust Mites.
   Section::::Early life and career.
   Household de-cluttering involves putting things in their proper place after they have been used. "Cleaning up your mess" might involve removing glasses or eating utensils from the living room if you have eaten a meal there in front of the television. If several people have done that over a few days and not removed their glasses, dishes and utensils from the living room, the living room is considered to be "cluttered" with dishes. The dishes are out of place because they belong in the kitchen, washed and put away in the cupboards. That is the most common example of clutter in a modern American household.
   Section::::Influence of human activity.
  
  Soil erosion is the main factor for soil degradation and is due to several mechanisms: water erosion, wind erosion, chemical degradation and physical degradation.
   Although, from a global perspective, harmful indoor air pollution is caused by cooking and heating with solid fuels on open fires or traditional stoves, especially in poorly ventilated rooms, indoor air pollutants may also come from heating and cooling equipment, electronic appliances, cleaning products, air fresheners, insecticides, and construction materials.
   A lawsuit in 2011 filed by 150 Waimea, Hawaii residents alleges that their homes were subjected, "on almost a daily basis", to blown "pesticide-laden fugitive dust". The residents claimed their homes sustained physical damage and they were forced to live with their windows closed year-round. They were seeking monetary damages from DuPont Pioneer to compensate for the reduced value of their homes and suggested future lawsuits would address health issues.
   During the cleaning, Aggie takes swab samples from the filthiest areas of the house and has them analysed in a lab, often revealing numerous kinds of bacteria, frequently "E. coli" or "Salmonella". Residents of the homes often have health problems that directly stem from the air quality or pathogens present before cleaning; Aggie will show the residents her findings in an effort to make them understand the connection between their health and their home's condition.
  