Sustainable Management of Natural Resources Class 10 Notes & Practice

Understanding the Need for Sustainable Management

Natural resources are not infinite. With the exponential increase in human population, industrialization, and urbanization, the demand for resources has reached unprecedented levels. Sustainable management refers to the controlled and planned utilization of natural resources so that they meet the needs of the present generation without compromising the ability of future generations to meet their own needs.

Mismanagement of resources leads to severe ecological crises, including global warming, soil erosion, deforestation, and water scarcity. A classic example studied in Class 10 Science is the Ganga Action Plan (launched in 1985), which was initiated to improve the deteriorating water quality of the River Ganga, heavily polluted by industrial effluents and domestic sewage. Measuring the coliform bacteria count (a group of bacteria found in human intestines) in water is a key metric used to assess pollution levels. Effective management requires a systematic framework of rules, community participation, and national policies to ensure resources are distributed equitably and conserved systematically.

The Step-by-Step Strategy of the Five R's

1. Refuse — Say no to things you do not need. This means refusing single-use plastic bags, unnecessary packaging, and non-biodegradable items at the source to prevent waste accumulation.
2. Reduce — Minimize your consumption of resources. Turn off unnecessary lights, repair leaking taps to save water, and walk short distances instead of driving to reduce fuel consumption.
3. Reuse — Use things repeatedly instead of throwing them away. For example, instead of discarding plastic bottles or jam jars, wash and reuse them to store household items.
4. Repurpose — When a product can no longer be used for its original purpose, think of a new way to use it. A cracked ceramic mug can be repurposed as a small pot for a indoor plant.
5. Recycle — Collect materials like paper, plastic, glass, and metal, and process them to manufacture new products. Note that recycling requires energy, so it should only be done when reuse is not possible.

Dams vs Traditional Water Harvesting Systems

Common Mistakes & Board Exam Tips

• Confusing Reuse and Recycle: Examiners frequently check your understanding of this. Remember, Reuse is always better than Recycle because recycling requires additional energy, fuel, and chemical processing, whereas reusing requires zero additional energy.
• Stakeholders of Forests: Always write all four categories of stakeholders in subjective answers: (1) Local people living in/around forests, (2) The Forest Department of the Government, (3) Industrialists who use forest produce, and (4) Wildlife and Nature enthusiasts.
• The Bishnoi Community: When writing about forest conservation, do not forget to mention the historical contribution of Amrita Devi Bishnoi, who sacrificed her life along with 363 others in 1731 to protect Khejri trees in Rajasthan. The Government of India institutes the Amrita Devi Bishnoi National Award for Wildlife Conservation in her memory.

Practice Questions with Solutions

• Q: Why is the 'Reuse' of materials considered better than 'Recycling'? A: Step 1: Analyze both processes. Recycling involves melting, processing, or chemically altering waste materials to manufacture new products. Reuse refers to using an item again for its original or a different purpose without processing. Step 2: Compare energy consumption. Recycling requires significant amounts of energy, fuel, and machinery, which releases carbon emissions. Reuse, on the other hand, consumes absolutely no energy or chemical resources. Step 3: State the environmental advantage. Reuse minimizes immediate waste generation without adding to environmental pollution. Final answer: Reuse is superior to recycling because it saves energy, prevents chemical pollution, and requires no processing costs, making it a highly sustainable option.
• Q: Who are the direct stakeholders of forest resources? Mention any two categories and their dependency. A: Step 1: Recall the definition of stakeholders. Stakeholders are individuals or groups who have an interest or are affected by the management of a resource. Step 2: List the first category. The local people who live in or around the forest. They depend on forests for firewood, small timber, fruits, and fodder for their cattle. Step 3: List the second category. The Industrialists. They view forests as a source of raw materials (such as wood for paper mills, tendu leaves for bidi manufacture) and are often not interested in the long-term sustainability of any single forest patch. Final answer: The primary direct stakeholders are (1) local communities who depend on forests for daily sustenance, and (2) industrialists who extract timber and raw materials for manufacturing.
• Q: What are the three major problems associated with the construction of large dams? Explain. A: Step 1: Identify the social problems. Large dams submerge vast agricultural areas and displace local villages, leaving people without homes or livelihoods. Step 2: Identify the economic problems. They consume massive amounts of public funds without offering proportional economic benefits to all sections of society. Step 3: Identify the environmental problems. They cause large-scale deforestation, lead to loss of biological diversity, and alter river ecosystems, often causing soil erosion and water logging downstream. Final answer: The three major problems of large dams are social (displacement of local communities), economic (high construction costs with skewed distribution of benefits), and environmental (destruction of biodiversity and local ecosystems).
• Q: Describe the 'Khadin' system of water harvesting used in Rajasthan. A: Step 1: Define the Khadin system. It is a traditional, runoff-agriculture-based water harvesting system designed for arid and semi-arid regions. Step 2: Explain the design. It consists of a long (100m to 300m) earthen embankment (called a bund) built across a sloping agricultural field. Step 3: Explain the mechanism. Rainwater flows down the slope and is stopped by the bund, creating a temporary reservoir. The collected water saturates the soil, recharging groundwater reservoirs. This moisture is then utilized to grow crops on the saturated soilbed during the subsequent season. Final answer: A Khadin is a traditional earthen embankment constructed across slopes in Rajasthan that harvests rainwater, saturates the farming soil, and recharges underground aquifers for sustainable agriculture.

Frequently Asked Questions