The EU must put an end to unabated fossil gas use by 2050 at the latest to comply with its climate neutrality objective. To stay within the Paris Agreement target of 1.5°C, the use of unabated fossil gas would have to end significantly earlier – by 2035. This report outlines the implications of this challenge for the management of the energy transition in a way that rapidly phases out Russian gas imports, protects security of supply and energy-poor consumers as well as the climate.