Page 178 - Science Class 06

Recycling Examples:

Recycling is another way to reduce wastes. v Wastes made up of metals like iron,
In this method certain kinds of wastes are aluminium, copper, etc. can be melted
used as raw materials to produce fresh in recycling plants by hea ng them at
goods. Such wastes are called recyclable high temperature. Then, they can be

wastes and this process is called recycling. used to make other items.
In other words, recycling is the process in v Broken glasses can also be melted and
which waste materials are transformed into can be used to produce other goods of
raw materials. It has been es mated that glass.
about 60% of the materials that we discard
v Paper can also be recycled to make
away can be stored and recycled.
fresh paper.

Make a list of tasks that you can do on your own to keep clean your surroundings.
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Waste : Useless and discarded materials
Biodegradable : Wastes which can be decomposed by micro-organisms
Non-biodegradable : Wastes which cannot be decomposed by micro-organisms
Decomposers : Organisms which can decompose biodegradable wastes

Dumping : A method of waste disposal
Composting : A method of waste disposal in which manure is produced
Manure : Substance that increase the fertility of soil
Reuse : A method to use waste materials in their original form

Recycling : A method to transform waste materials in raw materials

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i Wastes are found in all the three physical states— solid, liquid and gases.
i Food wastes, ashes, rubbish and plastic bags are some common solid wastes.
i Liquid wastes contain soil, soap, chemicals, pesticides, etc.
i Wastes can be classified into— biodegradable wastes and non-biodegradable wastes.
i Non-biodegradable wastes cannot be decomposed by micro-organisms.

i Polythene bags are very harmful for our environment.
i Reuse and recycling are the best methods to reduce the quantity of wastes discharged.

178 Science-6