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Infrastructure
What are the various non-commercial sources of energy?
The solar energy, wind energy and tidal energy are the non-conventional energies. India being a tropical country, has almost unlimited potential for producing all three types of energy using cost effective technology. Cheaper electricity can be produced by solar, wind, tidal, firewood and cow dung. 
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Why is health care a component of infrastructure ?
What is medical tourism?
What are primary health care centres in India?
What are secondary health care centres in India?
What services are provided by infrastructure?
What is economic infrastructure?
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Define economic infrastructure.
What are the types of economic infrastructure?
What are the sources of energy?
What is the relationship between infrastructure and production?
What are the sources of production of electricity?
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