Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilisation?
A. Thermal energy
B. Geothermal energy
C. Solar energy
D. Nuclear energy
Answer: Option C
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A. aluminium
B. iron
C. stainless steel
D. copper
A. Rutt
B. Stella Saundaraja
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D. Mary Jean Alexander

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