1. Rogelj, J. et al. in Special Report on Global Warming of 1.5 °C (eds Masson-Delmotte, V. et al.) Ch. 2 (IPCC, WMO, 2018).
2. Davis, S. J. et al. Net-zero emissions energy systems. Science 360, eaas9793 (2018).
3. Global Trends in Renewable Energy Investment 2019 (Frankfurt School-UNEP Centre/BNEF, 2019).
4. World Energy Outlook 2010 (International Energy Agency, 2010).
5. Arvizu, D. et al. in Special Report on Renewable Energy Sources and Climate Change Mitigation (eds Edenhofer, O. et al.) 34–212 (IPCC, Cambridge Univ. Press, 2011).