The National Thermal Power Corporation is the 4th highest taxpayer in the country.
It shelled out Rs 3,587 crore (Rs 35.87 billion) in 2007-08.
In 2006-07 the company contributed Rs 4,289 crore (Rs 42.89 billion) to the government's tax kitty.
Image: A hydroelectric plant. | Photograph: Evaristo Sa/AFP/Getty Images
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