Select two non-biodegradable substances from the following waste generated in a kitchen: Spoilt food, paper bags, milk bags, vegetable peels, tin cans, used tea leaves.
Which of the following are biodegradable and which non-biodegradable? Glass bottle, Paper, Ballpoint pen refill, Hay, DDT, Wheat, Cake, Wood, Polythene bag, Jute bag, Cotton cloth, Grass, Vegetable peels
(a) What is meant by biodegradable waste materials? Give two examples of biodegradable wastes.
(b) Which of the following materials are non-biodegradable? Aluminium wire, Tea leaves, Synthetic fibre, Wool