This document discusses global trends in energy investment from 2000-2035. It notes that $1.6 trillion was invested in energy supply in 2013, more than doubling since 2000. However, most investment is still in fossil fuels rather than renewables. Over 80% of upstream oil and gas investment is used to offset declining output from existing fields. Meeting rising global energy demand and replacing aging infrastructure will require $40 trillion in investment through 2035. Increased investment in energy efficiency of $550 billion annually is also needed but will require new financing models. Government policy and ownership will continue playing a large role in directing global energy investments and ensuring reliable energy supplies.