"India is the third largest energy consumer in the world after China and US. Its energy use will continue to increase," IEA chief economist Fatih Birol said at a workshop on India Energy Outlook here.
To meet the energy needs, India needs "USD 100 billion investment each year," he said, adding that mobilising the investment requires to keep pace with rising demand.
Three-fourth of this investment would need to go into power sector - new generation capacity as well as transmission lines and distribution network, and the rest into oil and gas fields, refineries and gas infrastructure, he said.
Foreign and private investors, Birol said, were ready to come and invest "but for that, conditions need to be right. Right pricing signals and right legal framework".
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"Prices need to be high enough to attract investment while at the same time affordable to the consumers," he said adding that recent moves like deregulation of diesel pricing and raising of natural gas rates were "in right direction".
"What matters to India does matter to global markets," he said.
A quarter of Indian population is without electricity and there are concerns over air quality and other environmental indicators, Birol said.
"India looks set to become the main driver of global energy demand... Much will depend on the economic and energy policy landscape," he added.
The chief economist of the Paris-based agency which advised 29 developed nations, said global oil prices are likely to continue to remain low in near future because of adequate supplies.
Middle East, despite geopolitical issues, will remain the most important oil supplier to the world and a critical source for India, he said.
India imports 77 per cent of its crude oil needs.