Timeline of notable events in the research and development of sustainable energy including renewable energy, solar energy and nuclear fusion energy, particularly for ways that are sustainable within the Earth system. Events currently not included in the timelines include: * events of new goal-codifying policy about, commercialization of, adoptions of, deployment-statistics of, announced developments of, announced funding for and dissemination of sustainable energy -technologies and -infrastructure/systems * research about related phase-outs in general – such as about the fossil fuel phase out * research about relevant alternative technologies – such as in transport, HVAC, refrigeration, passive cooling, heat pumps and district heating * research about related public awareness, media, policy-making and education * research about related geopolitics, policies, and integrated strategies (en)