The 2012 edition of Energy Technology Perspectives (ETP 2012) shows clearly that a technological transformation of the energy system is still possible, despite current trends. The integrated use of key existing technologies would make it possible to reduce dependency on imported fossil fuels or on limited domestic resources, decarbonise electricity, enhance energy efficiency and reduce emissions in the industry, transport and buildings sectors. This would dampen surging energy demand, reduce imports, strengthen domestic economies, and over time dramatically reduce greenhouse-gas (GHG) emissions. The ETP 2012 2°C Scenario (2DS) explores the technology options needed to realise a sustainable future based on greater energy efficiency and a more balanced energy system, featuring renewable energy sources and lower emissions. Its emissions trajectory is consistent with the IEA World Energy Outlook’s 450 scenario through 2035. The 2DS identifies the technology options and policy pathways that ensure an 80% chance of limiting long-term global temperature increase to 2°C – provided that non-energy related CO2 emissions, as well as other greenhouse gases, are also reduced.