Hindustan Zinc's green initiative has resulted in an annual saving of Rs 280 crore for the company. The company is a part of the Vedanta Group. The company generates wind energy of 273.5 mw across five States, including Gujarat (88.8 mw) and Karnataka (49.40 mw), Rajasthan (88.8 mw), Maharashtra (25.5 mw) and Tamil Nadu (21 mw), say media reports.    According to the reports, Hindustan Zinc produces 34.4 mw through waste heat recovery from its roasters. Besides wind projects, the company’s 9.4 mw waste heat recovery steam turbine generation and 21 TPH Low Calorific Value Gas boilers for steam generation projects are also registered for carbon credits.    The company's wind energy project is registered under the Clean Development Mechanism (CDM) programme by the United Nations Framework Convention on climate change and earns carbon credits, which can be sold to generate revenue.    The CD-registered project has helped Hindustan Zinc reduce carbon footprint by 583,685 tonne of carbon dioxide emission (t CO2e) a year.