By Vikas Bajaj / The Bulletin
December 29, 2011
KHADODA, India — Solar power is a clean energy source. But in this arid part of northwest India it can also be a dusty one.
Every five days or so, field hands with long-handled dust mops wipe down each of the 36,000 solar panels at a 63-acre installation operated by Azure Power. The site is one....