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प्रश्न
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Plastic waste
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उत्तर
Plastic is something which we use on a daily basis and has become an inseparable part of our lives. Despite its various uses, one of the major disadvantages of plastic is that it is an environmental pollutant. Plastic is considered non-biodegradable because it is made of very long polymer chains, which take quite a long time to degrade. Moreover, none of the saprophytes contain enzymes to digest plastic and obtain its nutrients. Since plastic is non-biodegradable, its proper disposal is also important or it may lead to problems like choking of sewage system, resulting in overflow of drains and death of animals by consuming plastic bags.
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संबंधित प्रश्न
Give any two ways in which biodegradable substances would affect the environment.
How can the wastes such as paper, plastic and metal objects be disposed of?
Identify biodegradable waste from the following:
peels of vegetables and fruits, metallic cans, broken plastic toys, broken glass cover, grass, paper, ball point pen refill
List some of the common wastes produced in mining operation and mention how these can be reused.
Mention whether the following statement is true (T) or False (F).
Some of the electronic wastes may contain valuable metals such as copper.
Match the items in Column I with as many times as possible in Column II.
|
Column I |
Column II |
|
1. Cow dung |
(i) Sugarcane |
|
2. Bagasse |
(ii) Raddiwalas |
|
3. Old newspapers |
(iii) Manure |
Mention whether the following statement is true (T) or False (F).
Electricity is one of the primary needs of human society.
How is sewage water treated?
The question has four options. Choose the correct answer:
Sewage sludge is used as
Choose the correct option:
The rotting of garbage is said to be completed when the garbage:
What are blue coloured bins used for?
Why should we not bum dried plant leaves and husk? What is the best way to get rid of them?
What are the advantages of cloth bags over plastic bags during shopping?
A garbage collector separate items mentioned below in the garbage into red, green and blue containers for their transfer to landfill, composting pit and recycling unit respectively.
Items:
- Plastic bags
- Newspaper and journals
- Screw and nuts
- Vegetable peels
- Metal chips
- Egg shells
Which items were transferred to which bin?
Read the poem written below and then answer the questions from the information gathered from the book or elsewhere.
Name the two kinds of waste that need to be separated from each other in two different waste bins.
List two classes into which garbage is classified.
Choose the odd one out from the following terms and name the category to which the others belong:
Used bandages, Pesticides, Face masks, Syringes
Choose the odd one out from the following terms and name the category to which the others belong:
