RT null T1 Renewables Global Futures Report 2013 A1 Institute for Sustainable Energy Policies, A1 Renewable Energy Policy Network for the 21st Century, K1 renewable energy source K1 investment K1 market economy YR 2013 FD 2013 LK https://wedocs.unep.org/handle/20.500.11822/32464 UL https://wedocs.unep.org/handle/20.500.11822/32464 NO This document explores perspectives on the future of renewable energy worldwide, blending insights from 170 expert interviews with over 50 published energy scenarios to map a range of credible possibilities for global energy transitions to 2050. It details how technological progress, dramatic cost reductions, market growth, and proliferating policies have propelled renewables to a mainstream status, with projections for future shares varying widely—from conservative estimates of under 20% to high-renewables scenarios surpassing 80% of total supply. By examining practical integration in electricity grids, buildings, industry, and transport, as well as the evolution of business models, local and national policy frameworks, and investment flows, the document underlines the challenges and opportunities ahead. DS UN Environment Document Repository RD Sep 24, 2026