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The term environment refers to the natural elements that make up the Earth and surround living organisms, enabling life. The study of the environment and its proper conservation, has gained enormous importance in last three decades. The term environmental pollution has become on..

- Rate at which population is growing. It is expressed on annual or decimal basis. It is difference between birth rate and death rate. Each one of the above derived parameter has specific significance in the study of population. Many of the above parameters are simultaneously studied at rural a..

Policy decisions are already taken in India to undertake technology developments for alternatives to CFCs. Two CSIR laboratories - National chemical laboratory and Indian Institute of Chemical technology are working on this. Along with this, parameters for design modifications such as com..

The units of fundamental physical quantities are called fundamental units. They are m, kg and sec. These units can neither be derived from one another nor can be resolved into other units. They are independent to each other. Units of physical quantities can be expressed in terms of funda..

. The management of such non renewable energy sources involves slightly different perspectives from those resources discussed earlier in terms of policy and technology issues. One way of conservation and managing of these resources is to substitute existing technologies so that ..