Tata Steel has been ranked first in the Dow Jones sustainability index 2018, making it the only domestic company to emerge as a winner among all 60 sectors evaluated for the ranking.This is the second year in the past three years that Tata Steel has been adjudged the industry leader amongst 24 steel companies globally, the company said in a statement Friday."This recognition encourages us to stay committed to our focus on creating a sustainable ecosystem and benchmark with best-in-class for further improvement," said TV Narendran, chief executive and managing director at Tata Steel.Launched in 1999, the Dow Jones sustainability index is a measure of gold standard for corporate sustainability and is the first global index to track the leading sustainability- driven companies based on analysis of financially material environmental, social, and governance factors.