E4tech is active across a range of energy topics from resource availability to energy use. Much of the work we do concerns the energy system as a whole, often linking our main themes of Vehicles, Fuels & Chemicals, and Heat & Power. Our Vehicles work is centred on the vehicle and its powertrain technology, but can also include, for example, infrastructure and fuelling. Fuels & Chemicals considers the energy carriers themselves, from resource extraction to end use. Heat & Power focuses on these energy sectors, their conversion technologies and surrounding environment. To allow us to address these broad topics coherently, we are organised into sectors.