SCIENCE (Code 086)
Chapter 16: Sustainable Management of Natural Resources
NCERT Solution CBSE 10th
IN-TEXT Questions Page No. 271
Question.1. What changes can you make in your habits to become more environment friendly ?
- Segregate waste into recyclable and non-recyclable parts.
- Switch off the lights, fans, television and other electrical appliances when not used.
- Use energy efficient electrical appliances.
- Walk for nearby shops instead of using vehicles.
- Reuse paper, plastic and glass bottles.
- Reuse water from washing machines for cleaning purposes.
Question.2. What would be the advantages of exploiting resources with short term aims?
Answer: The advantage of exploiting resources with short term aim would be self-centred satisfaction. They provide immediate advantages.
Question.3. How would these advantages differ from the advantages of using a long term perspective in managing our resources ?
Answer: This way the resources can be used for the benefit of the present generation and also conserved for the benefit of generations to come. This ensures uniform distribution of resources among the people.
Question.4. Why do you think there should be equitable distribution of resources ? What forces would be working against an equitable distribution of our resources ?
Answer: There should be equitable distribution of resources so that all, rich, powerful and poor people get benefit from the development of these resources. Rich, greedy and powerful people could work against an equitable distribution of our resources.
IN-TEXT Questions Page No. 275
Question.1. Why should we conserve forest and wild life ?
Answer: We should conserve forest and wildlife because of the following reasons.
- They help in maintaining the ecological balance at a place.
- They provide us with useful things like rubber, wood, dyes, gum, resin, oil, fibres, medicines, catachu, wax, honey, fruits, seeds, leaves of bidi etc.
- They purify the air, control flood and prevent soil erosion and maintain its fertility.
- Forests conserve biodiversity and hereditary resources. Ecological stability gets imbalanced due to damage in diversity.
Question.2. Suggest some approaches towards the conservation of forests.
Answer: Some methods for forest conservation are as follow :
- Only except some trees, there should be ban on cutting of forest. Forests stop soil erosion.
- Forests should be saved from fires. Many forests get destroyed due to fires.
- Forests should be saved from pests and insects. Pesticides, insecticides should be sprayed in forests.
- Overgrazing should be prohibited.
- National rules and laws should be strictly enforced.
IN-TEXT Questions Page No. 278
Question.1. Find out about the traditional systems of water harvesting management in your region.
- Many of us live in cities, where water is supplied by the municipal authorities. In the houses, systems of rainwater harvesting are installed which collect the water running off and channel it into a special pit created for the purpose. This helps to recharge ground water.
- Efforts are being made to collect run off rain water in soak pits. This water enriches underground water and can cause rise in water table.
- Run off water from roof tops can also be collected in trenches, specially made to enrich underground water table.
Question.2. Compare the above systems with the probable systems in hilly/mountainous areas or plains or plateau regions.
Answer: Drinking water system in hilly areas :
- Kuhls were a traditional irrigation system in hilly areas such as Himachal Pradesh. In this system, the water flowing through falls, comes to villages located at lower regions through small human made drains.
- In Meghalaya, the water is brought down to the lower areas of hills through bamboo drains.
Drinking water system in plains :
- Jhalaras were made in Rajasthan and Gujarat, essentially meant for community use and for religious rites.
- In some places bawaries etc. were made to supply water.
Drinking water system in plateau regions :
- Bandharas are check dams or diversion which were build across rivers. Such a traditional system was found in Maharashtra.
- In some regions, small pits were dug to collect water.
Question.3. Find out the source of water in your regions/locality. Is water from this source available to all people living in that area ?
- The main source of water in our region (Delhi) is river Yamuna, upper Ganga canal, Bhakra storage and ground water. Water after being treated is supplied to the residents through a system of water pipes.
- The water is available to all the people living in the area.
(Note : Students should write about the locality (region around them.)
NCERT Solution CBSE 10th
Question 1: What changes would you suggest in your home in order to be environment-friendly?
Answer: I will suggest following changes in my home:
- Replace all the bulbs and tube-lights with LED (Light Emitting Diode); to save electricity.
- Using natural ventilation; instead of air conditioners to cool the rooms.
- Using natural light during daytime to save on electricity.
- Use of handpumps; instead of electric motors to lift water.
Question 2: Can you suggest some changes in your school which would make it environment-friendly?
Answer: I will suggest following changes in my school:
- All the leaking taps should be immediately repaired.
- Windows of classrooms should be made bigger to allow natural light inside the rooms.
- Blackboard should be used more often and the use of projectors and computers should be minimized.
- Teachers should encourage students to use bicycles while coming to school.
- Teachers should also begin using bicycles; instead of cars and two-wheelers.
Question 3: We saw in this chapter that there are four main stakeholders when it comes to forests and wildlife. Which among these should have the authority to decide the management of forest produce? Why do you think so?
Answer: The forest dwellers should have the authority to decide the management of forest produces. There are various reasons for this. Some of them are discussed here. Forest dwellers have traditionally been dependent on forests for their livelihood. They have learnt to respect the forest and always desist from overexploitation of resources. They have some traditional knowledge which can really help in forest conservation.
Question 4: How can you as an individual contribute or make a difference to the management of (a) forests and wildlife, (b) water resources and (c) coal and petroleum?
Answer: (a) For forests and wildlife; I can contribute by reducing the use of paper. This would help in minimizing the need for cutting down trees.
(b) For water resources, I can contribute by preventing the wastage of water as and when possible.
(c) For coal and petroleum, I can contribute by using my bicycle for going to school. I can also take out awareness campaigns to educate people about the benefits of using environment-friendly modes of transport.
Question 5: What can you as an individual do to reduce your consumption of the various natural resources?
Answer: I can do following to reduce my consumption of various natural resources:
- I will prefer walking and cycling while commuting to short distances.
- I will avoid wastage of water as much as possible.
- I will minimize my usage of electricity.
- I will use public transport; instead of private transport.
Questions 6: List five things you have done over the last one week to
(a) Conserve our natural resources.
Answer: For conserving our natural resources, the five things which I did in the last one week:
- I used bicycle for going to school.
- I took bucket bath and stopped using the shower.
- I used old envelopes for doing rough work during my homework.
- I reduced my timing for watching TV.
- I took a public transport bus while going to a relative’s place.
(b) Increase the pressure on our natural resources.
Answer: Five things which increase pressure on natural resources:
- I played video games for a long period on one day.
- I forgot to switch off the light of my bedroom and slept.
- I went to a water-park, where too much water was being wasted.
- I threw away some plastic bottles which could have been reused.
- I made paper planes and played with them.
Question 7: On the basis of the issues raised in this chapter, what changes would you incorporate in your life-style in a move towards a sustainable use of our resources?
Answer: I would make following changes in my lifestyle to ensure sustainable use of our resources:
- I will use bicycle more often than earlier.
- I will use fresh water for bathing in the winter season; than using the geyser.
- I will start using jute/cloth bag, while shopping.
- I will collect old newspaper and give them to kabaadiwaala, for recycling.