The airline is currently in talks with the ministry of environment and forest, the Energy and Resources Institute and United Nations Environment Programme (to change the building into energy efficient and environment friendly.

Air-India chairman and MD Vasudevan Thulasidas said: "The Air-India building will be a statement � not only for the city but also for the country. It will inspire others to opt for environment friendly measures."

"As an airline, we burn lot of fuel which is not good for nature. But we intend to put across a strong message to the society through these symbols and through our efforts to improve energy efficiency," Thulasidas said.

Asked about the investment, he said there was no major investment required, adding, "But this will be more of a social message for preserving nature."

According to the plan, the building will special attention to minimise the use of light and air conditioning along with provision of waste management and water treatment.

This "green" initiative for Mumbai's one of first skyscrapers will even manage the release of gas required for fire extinguishers.

Thulasidas said the airline had set up an environment group comprising airline's engineers to explore advanced technologies that would minimise fuel usage in aircraft and boost efficiency.

"We are now adding a dedicated channel for environment protection in the in-flight entertainment channels. This is in association with UNEP. The airline is also designing a calendar with paintings by children on preservation of nature," Thulasidas added.