Green ratings were a no-no for most Indian companies till a few years earlier. But the ratings have now graduated from just being an initiative of non-government organisations to something both the government and industry would like to embrace fast...Last week, the Bureau of Energy Efficiency under the Union ministry of power announced a green rating programme for companies based on their consumption of energy...One of many reasons why green ratings are in vogue is that they pay off quite handsomely...the biggest draw for green buildings will be to make big bucks through carbon credits.