At this building, windmill blows away power bills

Mumbai In the peak of summer, when electricity bills climb in most households, Professor R Venkatesh of Sion is unperturbed. In 2007, he had installed a miniature windmill and solar panels on the terrace of his 11-storey building for his personal use; since then, he has been seeing a consistent drop in his monthly bills, by at least Rs 500 to Rs 750.