Garbage in Garbage out - Revision Notes

 CBSE Class–VI Subject Science

Revision Notes
CHAPTER – 16
Garbage in, Garbage out

Waste:  A material that has no longer any value to the person who is responsible for it.

Sources of Waste:

  1. Domestic (Household) Wastes: fruit and vegetable peeling, polypacks, bottle, garbage, rubbish, excreta, ashes, sullage are domestic wastes.
  2. Office and  Industrial wastes: wastes produced by industries. The common industrial wstes are smoke, plastic, objects, glass, fly ash, etc.
  3. Agricultural wastes: common agricultural wastes are rice husk, dried stems and straw, weeds and cattle waste.
  4. Commercial wastes: wastes generated from commercial establishments such as shops, malls, stores restarurants, hotels, motels, printing press, auto-repair shops, medical facilities. 

Type of wastes:

  1. Biodegradable wastes: Wastes which can be broken down through the action of microorganisms into their simple constituents. Example: plant products, organic wastes, domestic refuse and animal wastes.
  2. Non-biodegradable wastes: Wastes which cannot be disintegrated by action of microorganisms and remains unaffected from decomposition. Example: plastics, glass, metal, scraps, etc.
  3. Plastics: Many things are made up of plastics like bags, shoes, bottles, pipes, pens, etc. it cannot be converted into less harmful substances by composting.

ill effect of Plastics:

  1. Burning emits poisonous gases which cause health problems.
  2. Foods thrown in plastic bags are eaten by stray animals which can lead to death.
  3. Carelessly thrown plastic bags choke sewer system.
  4. Food stored in bad quality plastics can be harmful.

Management of Plastics:

  1. Do not throw plastics here and there after use.
  2. Do not burn pastic bags and other plastic items.
  3. Use paper or cloth bags in place of plastic bags.
  4. Educate friends and family members about the proper disposal of plastics.

Management and Disposal of Waste:

  1. 3R’s – Reduce, Reuse, Recycle. It means the reduce waste production, reuse of materials and recycle and reprocessing of waste materials for making new products.
  2. Landfills or Composting: Converting plant and animal waste including that from kitchen, into manure, is called composting. Low lying open areas to deposite biodegradable waste.
  3. Vermi-composting: Method of preparing compost with the help of red worms. Excreta of the worms make the compost very rich in nutrients.
  • Use of two type of dustbins GREEN AN RED . The Green one is for biodegradable wasrte, while the red garbage bin is for non-biodegradable waste.
  • Landfill is an area where the garbage collected from a city or town is dumped. The area is later converted into a park.
  • Paper can be recycled to get useful products.
  • Plastics cannot be converted into less harmful substances by the process of composting.
  • We need to generate less waste and find ways of dealing with the increasing amount of garbage in our surroundings.