Correct Answer - Option 2 : bone and polythene
Concept-
Biodegradable Waste/Products-
- A biodegradable substance is one that can be decomposed by bacteria or other natural species without contributing to waste.
- Microorganisms and other abiotic influences work together to degrade complex compounds into simpler organic matter that gradually suspends and fades into the soil.(degraded by natural factors such as microbes bacteria, fungi, and a few others and abiotic elements such as temperature, UV, oxygen, and so on.)
- The entire process is normal and can be fast or sluggish.
- As a result, the environmental problems and threats posed by biodegradable wastes are minimal.
EXAMPLES -
- Kitchen waste: vegetable peels, tea leaves, leftover food or rotten food, fruit seeds, eggshells, etc are biodegradable and can be used as compost for home gardening
- Plant products like wood and paper
- Human and animal waste (feel matter)
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Animal bones and remains of dead organic matter: contains carbon and calcium and some phosphates which are degradable, their period of degradation is relatively more due to their rigid structures but they are biodegradable.
Non-Biodegradable Waste/Products-
- A non-biodegradable material is one that cannot be broken down by natural organisms or natural agents and therefore serves as a source of contamination.
- Non-biodegradable waste, unlike biodegradable waste, cannot be easily treated.
- They will survive on Earth for thousands of years without deterioration.
- As a result, the threat posed by them is also more severe.
- They are the primary sources of air, water, and soil contamination, as well as diseases such as cancer.
EXAMPLES -
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Coal: obtained from the biodegradation of animal and plant remains so they can not be further degraded
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Glass: No effect of sunlight or microbes or other conditions that can degrade them into simpler forms hence come under this category
- DDT and DDD
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DDD(Dichlorodiphenyldichloroethane) and DDT (Dichlorodiphenyltrichloroethane): These are harmful pesticides that stay in the soil and seep into surrounding water bodies adding to the environmental pollution and the added risk to human and other organisms' lives.
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Polythene: are a widely used commodity in almost every industry and are temperature and heat resistant along with showing resistance against natural microbes
Explanation -
- DDT, DDD, Glass, Coal, and polythene are NON-BIODEGRADABLE.
- Only Bones are biodegradable from the given options.
Hence the correct option is - bone (BIODEGRADABLE) and polyethylene (NON-BIODEGRADABLE).