The potential for green buildings in India could open up a plethora of opportunities to the stakeholders such as the construction industry, architects and material and equipment manufacturers, according to Mr R. Parasu Raman, chairman, Indian Green Building Council. Delivering the theme address at the Green Building Congress 2004 which began here today, Mr Raman, who is also the vice-chairman of the World Green Business Council based in Washington, pointed out that the estimated potential for green building materials and equipment in the country was about $ 400 million by 2010.