Topic outline

    • Garbage in, Garbage out

      Q23. What should we do with the left-over food at home?

      Ans. We should do the following to the left-over food

                                i.        Preserve food properly for reuse.

                               ii.        Use it in preparation of some other food item and consume.

       

      Q24. What do you understand by vermicomposting?

      Ans. A type of earthworm called redworm is used for composting. This method of preparing compost with the help of redworms is called vermicomposting.

       

      Q25. Polythene bags should not be used for garbage disposal. Why?

      Ans. Plastics thrown carelessly get into drains and sewages which results in often blockage and causes water-logging. So polythene bags should not be used for garbage disposal.

       

      Q26. What are the uses of plastic?

      Ans. Cleaning solution and soap containers, food and drink storage, shopping bags, freezer bags, pipes, insulation, bottle caps, vehicle fuel tanks, protective helmets etc. are made from plastic.



      Q27. Why polythene bags create a big problem in garbage disposal?

      Ans. Some kind of plastics can be recycled, but, not all of them. Polythene bags and some plastics did not rot. Thus, Polythene bags create a big problem in garbage disposal.

       

      Q28. Why plastic should not be burnt?

      Ans. All kind of plastics give out harmful gases, upon heating or burning. These gases may cause many health problems, including cancer, in humans. Thus, plastic should not be burnt.

       

      Q29. How the non-useful component of the garbage is treated?

      Ans. The non-useful component is separated out. It is then spread over the landfill and then covered with a layer of soil. Once the landfill is completely full, it is usually converted into a park or a playground.

       

      Q30. The use of plastics in itself might not create so much of a problem. Comment

      Ans. The use of plastics in itself might not create so much of a problem. Problems arise when we use plastics excessively and are ignorant about ways of disposing their waste.

       

      Q31. Why is burning of husk, dried leaves and part of crop plants considered as bad practice? What could be a better alternative?

      Ans. Burning of these produces smoke and gases that are harmful to our health. We should try to stop such practices. These wastes could be converted into useful compost.


      Q32. Why we should not use wastes that may contain salt, pickles, oil, vinegar, meat and milk preparations as food for redworms?

      Ans. We should not use wastes that may contain salt, pickles, oil, vinegar, meat and milk preparations as food for redworms because if you put these things in the pit, disease-causing small organisms start growing in the pit.

       

      Q33. Suggest some handicrafts which can be prepared using waste material.

      Ans. Files from old charts, greeting cards decorated with flowers made from pencil shavings, mats from old clothes, baskets from used old polythene bags and diary from invitation cards are some of the items which can be prepared using waste material.

       

      Q34. Rag pickers always suffer from diseases. Give reason.

      Ans. Garbage dumps have flies, cockroaches and mosquitoes, which later turn into breeding grounds for micro-organisms that may cause disease.

      While picking through waste, the rag pickers put themselves at a great risk and are always prone to disease as the waste that they searches through can be infected.

       

      Q35. What are the effects of throwing garbage in open place?

      Ans. Effects of throwing garbage in open place

                                i.        Garbage will start decaying and as a result of this, bad smell spread in the nearby areas.

                               ii.        It will become a breeding ground for mosquitoes and flies.

                              iii.        It cause air pollution and thus causes many health problems.

                              iv.        It destroys the aesthetic look of a place.

       

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