Global diversified natural resource major Vedanta Group on Monday said that it will study the closure order of Sterlite's copper plant in Thoothukudi, Tamil Nadu and then decide on the future course of action. "Closure of Sterlite Copper plant is an unfortunate development, especially since, we have operated the plant for over 22 years in most transparent and sustainable way, contributing to the Tuticorin and state's socio-economic development," the company said in a statement.