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• What is the difference between conventional and alternative energy? • Montessori method as an alternative to the conventional teaching? • Do you think alternative medicine is more effective than conventional medicines? • What is conventional heating system? • Why alternative energy sources are not presently as attractive as conventional fossil fuels? • What is non conventional source of energy? • What are the advantages of non-conventional source of energy? • Types of conventional energy source? • What are the factors affecting the non conventional source of energy? • What are the advantages and disadvantages of non-conventional source of energy? • What is an alternative source of energy? • What is not an alternative energy source? • What is one source of alternative energy? • Alternative source of bismuth nitrate? • Does urine can be an alternative source of energy? • Who are the author of the alternative source of electricity?