Biology
Give reasons for the following:
(a) Broken glass utensils are a kind of non-degradable waste.
(b) Landfills are coming up fast near large cities.
(c) Why is municipal sewage first separated into degradable and non-degradable wastes?
Answer
(a) Broken glass utensils are a kind of non-degradable waste as they cannot be decomposed and broken down by living micro-organisms. These need to be disposed in deeply dug pits so as to cause no harm. One of the applications of broken glass is that it can be used in glass industries in larger quantities after melting.
(b) Large cities are seeing huge population growth and they lack in the usage of efficient and safe disposal method for the waste generated in these cities. Large cities are producing large quantities of non-degradable waste that ends up in landfills for disposal. Due to these reasons, landfills are coming up fast near large cities.
(c) Municipal sewage is first separated into degradable and non-degradable wastes because degradable wastes can be broken down into non-toxic waste in septic tanks, while non-degradable waste requires to be buried at safe places in order to avoid hazardous effects.
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