RAS RAS RAJASTHAN PUBLIC SERVICE COMMISSIONPSC 2013

  Based on the value addition and tangibility broadly we can have three types of industries – primary industries,secondary industries and tertiary industries. Primary industries are usually very simple industries involving processing of raw materials to give input goods for secondary industries. Here value addition is usually minimal and they are usually material oriented.Scale of … Read more

  Petroleum, natural gas, coal, nitrogen, uranium and water power are examples of conventional sources of energy. They’re also called non-renewable sources of energy and are mainly fossil fuels, except water power. Rising growth of population has created a tremendous pressure on the conventional resources of energy and thus the concept of sustainable development get prominent … Read more

  Mineral is a naturally occurring, homogeneous inorganic solid substance having a definite chemical composition and characteristic crystalline structure, color, and hardness Minerals are valuable natural resources that are finite and non-renewable. The history of mineral extraction in India dates back to the days of the Harappan civilization. The wide availability of minerals in the … Read more

    Industrial Uses The share of industrial sector is limited to 2 per cent of the surface water utilisation and 5 per cent of the ground-water. Rough estimates indicate that the present water use in the industrial sector is of the order of 15 km3 . The water use by thermal and nuclear power … Read more

  Water is a prime natural resource, a basic human need and a precious national asset. Planning, development and management of water resources need to be governed by national perspectives. India accounts for about 2.45 per cent of world’s surface area, 4 per cent of the world’s water resources and about 16 per cent of … Read more

  Rice The rice is cultivated on the largest areas in India. Historians believe that while the indica variety of rice was first domesticated in the area covering the foothills of the Eastern Himalayas (i.e. north-eastern India).Rice is a nutritional staple food which provides instant energy as its most important component is carbohydrate (starch). Rice … Read more

  Land is a finite resource. Land availability is only about 20% of the earth’s surface. Land is crucial for all developmental activities, for natural resources, ecosystem services and for agriculture. Growing population, growing needs and demands for economic development, clean water, food and other products from natural resources, as well as degradation of land … Read more

  What are natural resources ? Natural resources are useful raw materials that we get from the Earth. They occur naturally, which means that humans cannot make natural resources. Instead, we use and modify natural resources in ways that are beneficial to us. The materials used in human-made objects are natural resources. Some examples of natural … Read more

  The definition of function varies across the disciplines. In political science it refers to duties, in mathematics it means the relationship between two variables and in geography it is synonymous to occupation. Geographers have classified towns on the basis of their site, situation, size, rank, location and relative elevation. Functional classification of towns attempts to categorize … Read more

  Urban morphology is the study of the form of human settlements and the process of their formation and transformation.Morphological studies often deal with development of forms and pattern of the present city or other urban areas through time. Urban morphology is the study of the physical form of a city, which consists of street … Read more