The energy transition needs to move fast to avoid the worst impacts of climate change, but it also needs to develop in a way that ensures energy security, expands energy access and promotes sustainability. That will require striking the right mix of technological development and deployment, policy support, financing and public acceptance. It will also unfold differently in different parts of the world. What polices can accelerate energy security, energy access and emission reductions? What will be the key technologies? Where can investment unlock rapid technological progress? How can governments and companies collaborate to build a just, secure and sustainable future?