The Royal Dutch/Shell group has been ranked by the Fortune magazine as the number one of the petroleum refining sector. The criteria on which the ranking was done included : overall management
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/shell-group-rated-best-petroleum-refining-sector
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/bangladesh-observer-dhaka
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy