On the basis of kind of waste, which of the following sets of waste materials belong to the same category?
Old clothes, Milk cartons, Sewage
Spoilt food, Tea leaves, Vegetable peels
Tea leaves, Sewage, Waste paper
Old clothes, Milk cartons, Waste water
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.
(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