). Bio - degradable substance
. Non – luminous body
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Degradable substance:
*Biodegradable waste includes any organic matter in waste which can be broken down into carbon dioxide, water, methane or simple organic molecules by micro-organisms and other living things by composting, aerobic digestion, anaerobic digestion or similar processes.
*Degradable material contains food waste like vegetable and fruit peels, dead plants and animals, egg shells, chicken, garden waste paper materials, etc.
Non – luminous body:
*The non-luminous objects are visible because of luminous objects
*The moon and planets are the two examples
Explanation:
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