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प्रश्न
Write the benefits of recycling.
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उत्तर
- Old newspapers, note books, and magazines are sold to a scrap dealer. They will be made into new paper.
- PET bottles are recycled into plastic threads and used to make sports T-shirts.
- Old glass bottles and broken glass pieces are melted to make new glass.
- Broken metal items like tiffin boxes and plates are melted and made into new metal products like toys.
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संबंधित प्रश्न
After the examinations Rakesh with his friends went on a picnic to a nearby park. All friends carried cooked food packed in plastic bags or plastic cans. After eating the food some friends collected the leftover food and plastic bags etc and planned to dispose them off by burning. Rakesh immediately checked them and suggested to segregate the leftover food and peels of fruits from the plastic materials and respectively dispose them off separately in the green and red dustbins placed in the corner of the park.
(a) In your opinion, is burning plastic an ecofriendly method of waste disposal? Why? State the advantage of method suggested by Rakesh.
(b) How can we contribute in maintaining the parks and roads neat and clean?
What are the problems caused by the non-biodegradable wastes that we generate?
How does a biodegradable waste differ from a non-biodegradable waste? Give two examples of non-biodegradable wastes which pollute our environment.
Which of the following are biodegradable and which non-biodegradable?
Glass bottle, Paper, Ball point pen refill, Hay, DDT, Wheat, Cake, Wood, Polythene bag, Jute bag, Cotton cloth, Grass, Vegetable peels
Describe an activity to show that while paper is biodegradable but plastic (say, polythene) is non-biodegradable.
Give two examples of biodegradable wastes.
Which of the following materials are biodegradable?
Animal bones, Iron nails, Plastic mugs, Leather belts, Silver foil
n the following groups of materials, which group/groups contain only non-biodegradable materials?
(i) wood, paper, leather
(ii) polythene, detergent, PVC
(iii) plastic, detergent, grass
(iv) plastic, bakelite, DDT
(a) (iii)
(b) (iv)
(c) (i) and (iii)
(d) (ii) and (iv)
Which of the following is not a non-biodegradable material?
(a) nylon socks
(b) plastic school bag
(c) jute carry bag
(d) polyester clothes
We often use the word environment. What does it mean?
