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R
Radioactive waste
Waste products which emit radiation. Radioactive waste often lasts a
long time in the environment and can be very harmful to living things.
Raw materials
Unprocessed substances, or resources, used to make new products.
Recycling
Recovering and reprocessing materials that would otherwise become garbage.
Renewable energy
Energy produced from resources that can be used over and over again,
eg solar energy.
Renewable resource
A natural resource which can be replaced once it is used up, or used
over and over again, eg water, trees.
Repair
To fix items, so that they can be reused.
Resource
A material which is found naturally in the environment and is used for
food or energy or to produce other materials. eg coal, timber.
Reuse
To use materials again, instead of letting them become garbage.
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S
Starter
A material containing bacteria which is used to start the composting
process, eg dirt, manure or compost.
Sustainability
The ability to use resources now in a manner which will allow them to
continue to be used in the future.
Sustainable
A practice which does not put the environment or future resources at
risk.
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T
Textiles
Types of cloth or woven fabrics.
Tin
A silvery-white metal which is used to line steel cans, to protect the
contents and prevent rusting.
Topsoil
The top layer of soil, which contains most of the available nutrients.
Toxic
A material that is poisonous, and a risk to human health and the environment.
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W
Waste
Anything that a person owns which is considered no longer useful and
needs to be disposed of.
Worm farm
A type of compost bin that uses worms to help break down organic matter
more quickly.
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Z
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