(iii) Economic development provides favourable technologies. It helps in making various materials into resources. Fina consumption of resources. REVIEW QUESTIONS FOR PRACTICE in fear A. Short answer type questions (SA) 1. What is involved in the process of modification of a resource? 2. Why are the resources not a gift of nature? 3. How do the resources in the environment support the mankind? 4. Distinguish between the potential and developed resources. 5. Explain the purpose behind the sustainable development. 6. Why is it necessary to have a balanced resource planning? 7. What are the main features of arid soils in India? 8. Suggest measures of soil conservation in hilly areas. 9. Describe the main features of Earth Summit 1992 in Brazil. 10. Explain the main causes of soil degradation or erosion.
Answers
Answer:
1.Classification and record of resource across the areas of the nation. This entails the process of conducting surveys, mapping of the resources, qualitative evaluation and computation of the resources.
2.They are not free gifts of nature as : (i) Resources are a function of human activities, (ii) Human beings themselves are essential components of resources. (iii) They transform material available in our environment into resources and use them.
3.Natural resources are used to make food, fuel and raw materials for the production of goods. All of the food that people eat comes from plants or animals. Natural resources such as coal, natural gas and oil provide heat, light and power.
4.Potential resources- As potential resources are the resources that are present in a specific area and can be used in the future
Developed resources- Developed resources are all those served and defined for their quality and quantity.
5.Sustainable development is the idea that human societies must live and meet their needs without compromising the ability of future generations to meet their own needs. The “official” definition of sustainable development was developed for the first time in the Brundtland Report in 1987.
6. It is essential to have resource planning because of the following reasons: It helps to identify the various resources present in different regions of the country. It helps in the conservation of various non-renewable/extinguishable resources. It helps in reducing wastage of resources.
7.Some important features of arid soil are:
The soil red and brown in colour.
It is sandy in texture.
It is saline in nature and lacks humus and moisture.
Arid soils contain a substantial amount of soluble salts.
It is alkaline in nature because there is no rain to wash soluble salts.
8.Icrease the growth of trees to hold the soil together, an increase of tree cover will prevent destruction like landslides during rainfall or snow.
Stop cattle grazing as cattle tend to overgraze the land and make the soil loose leading them to poor holding and erosion.
9.(i)To achieve global sustainable development in the 21st century. (ii)To conserve biological diversity. (iii)To eliminate diseases with the help of shared welfares, requirements and obligations amongst various nations. (iv)To prevent poverty and environmental damage.
10.Soil degradation causes include agricultural, industrial, and commercial pollution; loss of arable land due to urban expansion, overgrazing, and unsustainable agricultural practices; and long-term climatic changes.
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