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According to the World Energy Outlook (published by the International Energy Agency) global energy demand rise by a third by 2035.
While rich countries will not see much demand increases, annual growth rates of 2-3% are expected in South-East Asia, India, Brazil and the Middle East. China will account for 40% of the growth until 2025. After then India will overtake it to become the single biggest source of increasing demand.
Oil will remain the largest single source of energy, though total energy consumption will decline from 31% to 27% by 2035. Coal’s share will fall, natural gas will rise. Total increase in demand for gas will outstrip both oil and coal combined.