Get summaries, questions, answers, solutions, notes, extras, PDF and guides for Chapter 5 Environmental Management: NBSE Class 12 Environment (Environmental Education) textbook, which is part of the syllabus of students studying under the Nagaland Board. These solutions, however, should only be treated as references and can be modified/changed.
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Summary
Development affects the environment. Development does not mean growth alone. It also includes education, health, nutrition, discipline and honest work. Science and technology use environmental resources. When we use too much of these, the environment gets damaged. That is why we need environmental management.
Environmental management means finding and solving environmental problems. It includes science, engineering, economics, and rules. These are used to check and stop pollution. Economists help by studying the cost and use of natural things. Policymakers make rules to keep people and nature safe.
In early times, farming led to cutting forests and using more land. Cities grew as people left farms to do other jobs. This caused more use of resources and harmed nature. Bad farming, overgrazing and too much cutting of trees made things worse. The Industrial Revolution made things change fast. Machines replaced people. Cities grew bigger. Pollution increased. Forests and animals were lost.
The “multiple cause and effect” model shows that many things cause environmental problems. These include population growth, use of resources, economy, politics, science, and even people’s habits. These problems include air and water pollution, climate change, loss of animals, hunger, and disease.
Coal mining shows how development can damage nature. It pollutes air, water and land. Burning coal causes smoke and harmful gases. Mining destroys land, trees, and plants. Rivers get dirty. Animals and plants die. Forests are cut for wood to support mines. People move near mines, and this leads to crowding, sewage and waste.
Human activities affect both living and non-living things. This is shown in the “impact analysis model”. For example, cutting trees and building factories can lead to bad air, dirty water and fewer animals.
There are four parts of environmental management. Technology helps by building machines that reduce waste and use less fuel. Economically, rules and prices can be used to save resources. Ethically, we must ask what is right and wrong in how we use nature. Socially, people must work together to protect the earth. We need to stop being careless. We need to think of others and the future.
If we all act wisely, we can stop further damage. Nature can heal but only if we give it time and care. Environmental protection is needed for everyone to live well.
Textbook solutions
Short Answer Questions
1. Define environmental management.
Answer: Environmental management includes all the technical, economic, and other aspects of the environment. It begins with the identification of the problem to find its solution. Thus, environmental management encompasses prevention and control measures, policy framing, modelling, and environmental monitoring. It is also the operational concept of action influencing human activities, which affect the environment.
2. Why is environmental management necessary?
Answer: Environmental management has become an urgent need as there is an alteration of the environment due to development. Development through science and technology always involves environmental resources, and unlimited use of these degrades the environment, making environmental management a prime necessity. It is quite obvious now that environmental problems such as air pollution, water pollution, soil erosion, destruction of forests and wildlife, etc., are the results of ever-increasing demands of industrial societies on the environment. Furthermore, extensive use of Earth’s resources has caused depletion of natural resources, increased pollution, and caused a threat to resources being depleted.
3. What is vital for successful environmental management?
Answer: For environmental management to be successful, it must include environmental science and engineering, economics, and policy.
4. What change in development occurred due to Industrial Revolution?
Answer: The Industrial Revolution brought a major change from small-scale manufacturing by hand to large-scale manufacturing by machine. This led to the development of industrial society in which manufacturing of different objects used up more and more energy resources and was less labour intensive in nature. The use of machines on farms displaced many farm labourers and led to many rural people going to the cities. The shift from an agricultural to an industrial society brought a sudden and major change in the way human beings interacted with the environment, and thus, interaction became more negative as it damaged the environment.
5. What is the cause of development of some countries?
Answer: The prosperity gained in some countries has been attained due to developed farming, forestry, and industries which herald profit and progress for a very short time.
6. How is an Impact Analysis Model useful?
Answer: An Impact Analysis Model is useful because it shows the impact of human activities on both abiotic environmental factors, i.e., air, water, and land; and biotic factors, i.e., plants, animals, and other organisms on this planet. It demonstrates how biota are affected directly by human activities as well as indirectly through the environmental degradation caused by human activities, thereby helping to understand the direct and indirect impact of human activities on our environment and biota.
7. How does coal mining lead to land degradation?
Answer: Land degradation is a direct result of coal mining. When a coal mine is dug up, the surface of the Earth is ripped up, and the soil structure and vegetation cover are destroyed. Additionally, the acid that drains from coal mines can kill aquatic plants and animals, natural vegetation gets destroyed, and mining may cause unreclaimed land. These conditions cause soil erosion, which in turn leads to increased sediment deposition in streams.
8. What is the Multiple Cause and Effect Model?
Answer: The Multiple Cause and Effect Model is aimed at understanding the current environmental problems at an individual level and shows that these problems are caused by various factors like population, per capita consumption, economics, technology, public policies, politics, biology, psychology, and culture, which are signs of development. It is used to study the individual environmental issues which contribute to the current environmental problems.
Long Answer Questions
1. Discuss the technological and ethical aspects of environmental management.
Answer: The technological aspect of environmental management involves the use of technical measures. Such technical measures that can be used to reduce pollution may include fuel-efficient designs of automobile engines, recycling of water, and the use of low waste technologies. For instance, if we observe the conventional irrigation system, up to 60% of water is lost on its way from the source to the plant, and another large part is lost in the form of evaporation from fields that are flooded. By using drop and sprinkler irrigation systems, this can be avoided. Using CNG and other cleaner fuels in vehicles will also reduce air pollution.
The ethical aspect of environmental management addresses how, knowingly or unknowingly, we are greedily consuming our resources, spoiling them at the same time, and polluting our surroundings with enormous quantities of wastes of all types. Science may aid in determining or predicting the result of these types of actions, but it cannot answer the question of what course of action we ought to take. The question of what ought to be done can only be answered based on some set of values. Ethics is the philosophical study of moral values, and environmental ethics is the application of ethical study to environmental concerns. A key aspect of environmental ethics is developing and justifying a theory of the moral relations between humans, non-human species, and the natural environment. Environmental ethics can be viewed as an integral part of a more comprehensive environmental philosophy – a description and understanding of exactly how the Earth works and the position of humans within that world. The importance of environmental ethics cannot be overstated as these issues affect each one of us on a daily basis. Every human decision made with respect to environmental issues is made in the context of some environmental philosophy.
2. What are the social and economic aspects of environmental management?
Answer: The economic aspect of environmental management includes the usage of market-based instruments such as tradable pollution discharge permits. These can be used in combination with the participation of the community to collect user charges, which would be highly beneficial in smaller towns and establishments where the search for cost-effective solutions to problems is always looked out for. Incentives can be given to those who excel, and defaulters can be penalised if they fail to follow pollution control norms; this method can be tested in the market. Other than this, resources must be priced correctly to minimise their wastage and misuse, a norm especially applicable to the usage of water and electricity. Excessive withdrawals of groundwater can be controlled by this measure. Environmental Resources Accounts (ERA) should be utilised for getting to know the benefits of a development project. It must be calculated to know the cost of resource depletion, degradation, and replenishing that is required in the form of monetary values. The total cost of a resource can account for the depletion, damages, cost, and benefits obtained by enhanced environmental quality. Such ERA exercises can be beneficial in getting the right price of a resource, thus aiding in reducing pollution.
The social aspect of environmental management recognizes that the world’s resources of non-renewable fuels are exceedingly unevenly distributed and limited in quantity, making their exploitation at an ever-increasing rate a violent act against nature. As members of society, we must take it as a social responsibility to create a healthy, peaceful world for ourselves and our future generations. We must strive for a viable future visible in the present—a life that is not only ecologically sound but vastly more fulfilling than industrial life. Our present way of life is marked by a lack of sensitivity and led by a profit motive. We need people to work for the future environment with compassion and create an environment ready to accommodate the smallest insect to the largest creature in harmony with human beings. While we have the power to reverse the damage done to the environment, and the environment has the capacity to heal itself, our excessive abuse is not making this easy for it. Development leads to interference with the environment, but this interference should be limited so that it does not harm the quality of the environment. Along with government agencies, public awareness is also an important factor in managing the environment as far as facing and solving current environmental problems is concerned. Environmental problems caused over decades or centuries occur due to disregard and careless handling of our environment and the population explosion, which is still on an increase.
3. How do developmental human activities influence the environment?
Answer: Developmental human activities influence the environment in several significant ways. Development itself is a comprehensive concept that not only means growth but also covers education, economic health, nutrition, organization of people, and disciplined and honest labour. Development through science and technology always involves environmental resources, and the unlimited use of these resources degrades the environment. This has made environmental management an urgent need due to the alteration of the environment caused by development.
After early man’s development into agricultural societies, there was an increase in productivity. As ploughs were made, farmers began using up grasslands as agricultural lands. Population increased, and people turned to cities for small crafts and small-scale jobs. This increased the demand on the environment for essential resources. The city became a centre of trade, commerce, religious, and governmental activities. As exploitation of resources began, it was accompanied by degradation of land, which eventually led to the destruction of the natural environment. Environmental problems increased due to overgrazing, excessive timber cutting, and bad agricultural practices.
The Industrial Revolution brought a major change from small-scale manufacturing by hand to large-scale manufacturing by machine, leading to the development of industrial society, which used up more and more energy resources and was less labour-intensive. The use of machines on farms displaced many farm labourers, leading many rural people to go to the cities. This shift from an agricultural to an industrial society brought a sudden and major change in the way human beings interacted with the environment, making the interaction more negative as it damaged the environment.
Environmental problems such as air pollution, water pollution, soil erosion, destruction of forests and wildlife, etc., are the results of ever-increasing demands of industrial societies on the environment. As members of an industrial society with much advanced technology, we can observe an obvious rise in production, consumption, use of non-degradable synthetics, and more and more usage of non-renewable resources. There has been a large increase in energy demands, in turn causing a huge increase in problems such as pollution, resource depletion, global warming, health hazards, nuclear hazards, and over-population. The degradation of biological and physical systems is not only an environmental concern but also has social, economic, and political impacts, apparent not only in one country but on the whole world. Extensive use of Earth’s resources has caused depletion of natural resources, increased pollution, and caused a threat to resources being depleted. Advancement in technology has meant that Earth’s ecosystem is suffering due to our actions, as we are often not aware of how it functions. There is too much interference in the natural processes in today’s times, and this is ever on the increase.
For example, the Industrial Revolution led to an increased demand for coal. Coal mining and related activities, such as trucks, cause air pollution. Burning coal in power stations causes a lot of pollution, with a single 1000 megawatt coal-fuelled power plant giving out approximately 1,500 to 30,000 metric tonnes of particulates, smoke, ashes, and 11,000 to 110,000 metric tonnes of sulphur dioxide gas every year. Coal mining also causes water pollution; in abandoned underground coal mines, sulphur-containing minerals react with water and oxygen, producing highly corrosive sulphuric acid, which pollutes lakes and rivers downstream. Land degradation is a direct result of coal mining, where the surface of the Earth is ripped up, and the soil structure and vegetation cover are destroyed. The acid that drains from coal mines kills aquatic plants and animals and leads to corrosion of metallic structures. Natural vegetation gets destroyed, and mining may cause unreclaimed land, leading to soil erosion and increased sediment deposition in streams, resulting in the death of bottom-dwelling organisms. Denudation of forests is caused due to coal mining, as coal mine galleries use timber support. Population density also changes in and around areas with coal mines, and natural vegetated areas may be encroached by miners. As people move into these areas, housing, sewage, and water supply systems are required, and if they already exist, they undergo a lot of strain.
All types of environmental pollution caused by human activities have an indirect impact on the biosphere of our planet. Human activities also have a direct impact on biota. Mining disturbs the land and causes pollution of underground water. As most mining activities are carried out in forested areas, there is a negative impact on the environment in the form of deforestation. Society is paying a heavy price for development by causing environmental degradation due to the overexploitation of resources. Development leads to interference with the environment, and this interference should be limited so that it does not harm the quality of the environment.
4. How is environmental development related with environmental management?
Answer: Environmental development is intrinsically linked with environmental management. Environmental management has become an urgent need because there is an alteration of the environment due to development. Development, a comprehensive concept, involves the use of environmental resources, especially through science and technology. The unlimited use of these resources degrades the environment, making environmental management a prime necessity.
A proper environmental management strategy aims at ‘creating minimum pollution’ and minimising the usage of resources to lead to sustainable development. Human development can be sustained by taking steps that are positive and progressive towards environmental protection. An understanding of the symptoms of environmental stress and their cause identification is essential if environmental resources are to be better managed.
Historically, as human societies developed, for instance, by transitioning to agricultural and then industrial societies, the exploitation of resources increased, leading to environmental degradation. Many countries have raced blindly towards development and prosperity, paying little heed to correcting the faults they have caused. The prosperity gained in some countries has often been attained through developed farming, forestry, and industries that herald profit and progress for a very short time, leading to too much interference in natural processes. This underscores the need for management to guide development in a more sustainable direction.
Development leads to interference with the environment. However, this interference should be limited so that it does not harm the quality of the environment. Environmental management provides the framework and tools—including technical, economic, ethical, and social aspects—to ensure that development occurs in a way that is environmentally sound and sustainable. For development to be successful and sustainable, environmental management must include environmental science and engineering, economics, and policy. Society pays a heavy price for development when it causes environmental degradation due to the over-exploitation of resources; environmental management seeks to mitigate this price.
Think and Answer
Coal mining is a developmental human activity that has many negative impacts on the environment. Discuss what steps you would take to transform an area where coal mining is carried out into an area where sustainable development is carried out.
Answer To transform an area where coal mining is carried out into an area where sustainable development is carried out, I would take the following steps, focusing on creating minimum pollution and minimising resource usage, which are key aims of a proper environmental management strategy for sustainable development:
- Comprehensive Environmental Assessment and Planning:
First, I would ensure a thorough identification of the problems, as environmental management begins with this. This involves assessing the extent of environmental damage from coal mining, such as air pollution from mining activities and trucks, water pollution from acidic drainage polluting lakes and rivers, land degradation where the surface of the Earth is ripped up and soil structure and vegetation cover are destroyed, denudation of forests, and the impact on local biodiversity .
Based on this assessment, I would help develop a comprehensive environmental management plan. This plan would encompass prevention and control measures, policy framing, modelling, and environmental monitoring, as these are crucial components of environmental management . - Land Reclamation and Ecological Restoration:
A primary focus would be on addressing the severe land degradation. This involves:- Reclaiming the mined land by restoring the soil structure and re-establishing native vegetation cover to prevent further soil erosion and increased sediment deposition in streams .
- Undertaking reforestation programs to counteract the denudation of forests, which often occurs due to the need for timber support in mine galleries or general encroachment.
- Restoring habitats to encourage the return of local wildlife and improve biodiversity.
- Pollution Control and Mitigation using Environmental Science and Engineering:
- Water Pollution: I would prioritize implementing engineering solutions to treat the highly corrosive sulphuric acid that drains from coal mines, which kills aquatic plants and animals and pollutes water bodies . This is essential to prevent and control pollution.
- Air Pollution: For any residual or related industrial activities, I would advocate for the adoption of technologies and practices to minimise air pollution, including particulates, smoke, and sulphur dioxide gas .
- Waste Management: I would promote the use of low-waste technologies for managing any waste from reclamation or ongoing necessary activities.
- Sustainable Resource Management and Infrastructure:
- Water Resources: Implement measures for the efficient use and protection of water resources, including treating polluted water and ensuring sustainable water supply systems for any local communities, addressing the strain that development can put on such systems.
- Natural Resources: Ensure that any continued use of resources is minimized and managed responsibly to prevent overexploitation .
- Integrating Economic, Social, and Policy Aspects for Long-term Sustainability:
- Economic Diversification: To ensure long-term sustainable development, I would explore and support the development of alternative, environmentally sound economic activities for the local population. This would reduce dependence on extractive industries.
- Community Engagement and Public Awareness: I would work to involve the local community in the planning and implementation of the transformation. Public awareness is an important factor in managing the environment
- Policy and Regulation: I would support the establishment and enforcement of a robust set of rules and regulations by responsible and qualified authorities for safeguarding the welfare of the society and the environment. This includes policies for ongoing environmental protection and sustainable land use.
- Ethical Considerations: Promote an understanding that development should not come at the cost of severe environmental degradation and that we have a responsibility to ensure a healthy environment for future generations
- Continuous Monitoring and Adaptive Management:
I would ensure that a system for ongoing environmental monitoring is in place. This would track the effectiveness of reclamation and pollution control measures, monitor the health of the ecosystem, and allow for adaptive management, making adjustments to the plan as needed based on scientific data and practical outcomes.
By taking these steps, which integrate environmental science and engineering, economics, and policy , the aim would be to transform the coal mining area from a site of environmental degradation into one that supports sustainable development, where human activities and the environment can coexist harmoniously, and human development can be sustained through positive and progressive environmental protection
Project Work & Activity
Present this situation in class: A chemical factory is a major supplier of chemicals to many industries. Nearly 3000 workers earn their living from this factory. Chemical effluents from the factory pollute the water of a nearby river. Environmentalists observe that farmers are suffering crop failure as agricultural lands are polluted, cattle began dying and skin diseases have increased. After consulting pollution control agencies the environmentalists led protests to cause closure of the factory. But this would stop development in the area and 3000 workers will become jobless.
Hold a discussion on this situation with your family members and classmates. Prepare a short conclusive report on the ideas, suggestions and justifications put forward. Present the report in your class.
Answer: Do it yourself. Here are the instructions:
- First, really understand the problem:
- Read the story about the chemical factory carefully.
- Think about who is affected: the 3000 workers, the farmers, the people getting skin diseases, the factory owners, and the environment (the river).
- What is the main fight here? It’s between having the factory (which gives jobs and helps other industries) and having a clean, safe environment.
- Talk to people about it:
- Chat with your family. Ask them what they think.
- Should the factory close down? Why or why not?
- What about the workers who will lose their jobs?
- What about the farmers and the polluted river?
- Are there any ways the factory could work without polluting so much?
- Discuss the same things with your classmates.
- You will hear many different opinions. Note them down.
- Try to understand why different people have different ideas.
- Chat with your family. Ask them what they think.
- Think of ideas and suggestions (solutions):
- What could the factory do to stop or reduce pollution? (Maybe they can clean their waste water before it goes into the river? Or use safer chemicals?)
- What could the government or the pollution control people do? (Maybe they can make strong rules for the factory? Or help the factory buy machines to clean the waste?)
- If the factory has to close, what can be done for the 3000 workers?
- How can the polluted river and farmlands be cleaned up?
- Explain your reasons (justifications):
- For every idea or suggestion you have, think about why it’s a good idea.
- For example, if you suggest that the factory should install a treatment plant, explain how this helps the river, the farmers, and the people, while also letting the factory stay open and provide jobs.
- Try to find ideas that are fair to everyone – the workers, the farmers, the factory, and the environment. This is about finding a balance.
- Write your report:
- Start by explaining the problem of the chemical factory in your own words.
- List the different ideas and suggestions you got from your discussions and your own thinking.
- For each idea, write down the reasons (justifications) why it could work or what its good and bad points are.
- Try to give a final thought or conclusion. What do you think is the best approach to solve this problem? Or, what are the most important things to think about?
- Keep your report short and clear.
- Present your report in class:
- When it’s your turn, stand up and speak clearly.
- Tell the class about the factory problem.
- Share the different ideas and suggestions you found.
- Explain your group’s (or your own) conclusion and the reasons for it.
- Be ready to answer any questions your teacher or classmates might ask.
Extras
Additional Questions and Answers
1. Besides growth, what does development cover?
Answer: Besides growth, development also covers education, economic health, nutrition, organization of people as well as disciplined and honest labour.
37. Describe the Impact Analysis Model for studying the impact of human activities on the environment.
Answer: The Impact Analysis Model shows the impact of human activities on both abiotic environmental factors, such as air, water, and land, and biotic factors, like plants, animals, and other organisms on this planet. According to this model, biota are affected directly by human activities as well as indirectly through the environmental degradation caused by these activities. The model illustrates the direct and indirect impact of human activities on our environment and biota.
Additional MCQs (Knowledge Based)
1. Which term describes the operational concept of action influencing human activities that affect the environment?
A. Ecology
B. Environmental management
C. Conservation
D. Sustainability
Answer: B. Environmental management
31. What effect does acid drainage from coal mines have on water bodies?
A. Purifies water
B. Kills aquatic life
C. Increases fish populations
D. Reduces sediment
Answer: B. Kills aquatic life
Additional MCQs (Competrency Based)
1. Environmental management primarily involves:
i. Only the growth of an economy.
ii. The education, economic health, and organization of people.
iii. Addressing the alteration of the environment due to development.
iv. Focusing solely on technological solutions for pollution.
Options:
A. i and iv
B. ii and iii
C. Only iii
D. All of the above
Answer: C. Only iii
41. Assertion (A): The deterioration of biological and physical environmental systems leads to social, economic, and political consequences that have global reach.
Reason (R): All human beings rely on a shared global biosphere for their fundamental sustenance and survival.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R does not explain A.
(c) A is true but R is false.
(d) A is false but R is true.
Answer: (b) Both A and R are true but R does not explain A.
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