Renewables are steadily becoming a greater part of the global energy mix, in parƟcular in the power sector and in regions that have put in place measures to promote their deployment. Double-digit growth rates have been observed in the last decade for some renewable energy technologies and renewables are projected to conƟnue to grow strongly over the Outlook period to 2035, provided that the necessary support measures are kept in place. However, the situaƟon is nuanced across the three main energy uses: electricity, heat and transport. Electricity generaƟon from renewable sources is growing rapidly for most technologies͖ while renewable energy use for heat is growing more slowly and remains under-exploited. AŌer a period of rapid expansion, the rate of growth of biofuels use has recently slowed, due largely to adverse weather condiƟons that reduced harvests and increased feedstock prices, as well as sustainability concerns. Investment in renewable power generaƟon has also been rising steadily but it fell, for the Įrst Ɵme, in 2012. In part, this reŇects falling unit costs͖ but it is perhaps also a sign that the prospects for renewables are becoming more complex.