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12 SOURCES OF ENERGY
nios.ac.inperiod of time. Such energy sources are referred to as renewable energy sources, whereas the energy sources that we are using up and cannot be generated in a short period of time are called non-renewable energy sources. Thus, all the sources of energy can be divided into two categories: renewable sources and non-renewable sources of energy.
Chapter 14 Energy - Finance
www.finance.gov.pkOne of the opportunity costs of civilization is increase in the amount of consumption of energy per capita per year. Many alternative sources of energy