-44. Solid and semi-solid waste materials are called A. garbage B. stable manure C. refuse 45. kitchen. are left-over vegetables, animal, fish, and other waste materials from the A. Garbage B. Refuse C. Rubbish 46. Waste materials such as bottles, broken glass, tin cans, waste papers are A. garbage B. refuse C. rubbish 47. It is a viral infection of the upper respiratory tract caused by many different viruses. A. Respiratory Disease C. Skin Disease B. Gastrointestinal Disease D. Neurological Impairment 48. What is one of the causes of Neurological Impairment? A. Drinking unclean water C. Mercury poisoning B. Exposure to too much sunlight D. Malnutrition 49. How can we make sure that the water that we are drinking is safe and clean? to drink water A. Get water from lakes and rivers. C. Drink soft drinks instead. It's no longer safe B. Boil water for a few minutes. D. Collect rain water during rainy season. 50. What type pollution is cause by unpleasant sound of vehicles, factories, construction work and many other? A. Air Pollution C. Noise Pollution B. Water Contamination D. Land pollution​