International Energy Agency has said that India needs more than Rs 9 lakh crore in energy investment per year by 2040 as it is set to contribute more than any other country to the rise in global energy demand. Of this, around seven lakh crore rupees are required every year in energy supply, 75 per cent of which is required to meet India's burgeoning need for electricity, and a further two lakh crore rupees per year to improve energy efficiency, Executive Director of International Energy Agency, IEA, Fatih Birol said today while releasing India Energy Outlook 2015 in New Delhi.