Environment clearance to South Korean steel major Posco for a four million tonne per annum (mtpa) steel plant was granted in July 2007.
It had only five years validity and revalidation was necessary for Posco India to start construction work.
The revalidation was approved by the reconstituted Expert Appraisal Committee (Industry) in its meeting held during May 16 to 17.
"The Committee recommended the revalidation of the environmental clearance granted to M/s POSCO (India) Private Limited," the sources said.
Environment Ministry had granted final forest clearnce approval to Odisha for diversion of 1,253 hectares of forest land for Posco's steel project in May 2011.