Page 1 :
Cc., , Short Answer Questions., , 1., , Waste that can be decomposed by the action of microorganisms (like, bacteria and fungi) into simple and harmless substances so that they, cannot harm the environment are called biodegradable waste. Peels, and cuttings of fruits and vegetables, animal dung, agricultural wastes, are some examples of biodegradable waste., , Waste that cannot be decomposed by the action of microorganisms into, , harmless substances are called non-biodegradable waste. The objects, , made from plastic, glass and metals are non-biodegradable waste., , By recycling used paper, we can make new paper from old, used and, , discarded paper and can save many trees., , Making useful things from waste materials is called recycling. Materials, , like glass, metal, plastic and paper are recycled to make fresh glass,, , metal, plastic and paper., , Composting is better than burning of leaves because composting results, , in the production of natural fertiliser (compost) while burning of leaves, , produces smoke and gases that are harmful for the human health and, environment., , (a) Rohan gave his bag to Radha as he has a new bag to use and does, not need his old bag. Radha needed that bag to carry her books to, school., , (b) Caring, sharing, kindness and being ecofriendly by the reuse of the, thing., , Segregation or separation of biodegradable and non-biodegradable, , waste is necessary because biodegradable waste are decomposed, , through composting and vermicomposting while non-biodegradable, waste are disposed by other methods like incineration., , D. Long Answer Questions., , 1., , The harmful effects of wastes are as follows—, , (i) Wastes make the surroundings dirty and ugly., , (ii) Wastes give foul smell and the dumped garbage becomes breeding, ground for flies and mosquitoes which spread various diseases., , (iii) Drains get choked and overflowing of sewage may contaminate, drinking water., , (iv) Non-biodegradable wastes can cause various types of pollution., , (v) They can block the digestive canals of stray animals, if eaten by, them., , Plastic is a boon because plastics have made our life easy and, , comfortable. Most of the things we use in our daily life are made up, , of plastic. It will not be wrong to say that we live in plastic age. Plastics, , are used in a wide range of products from paper clips to spaceships