[en] Sheets propose graphs, figures and tables of data which illustrate CO₂ emissions greenhouse (gas emissions per country, per inhabitant, their evolutions, and CO₂ emissions per fossil energy type in the world and per country), domestic electric power consumption in France (electricity consumption in the French global assessment, electricity consumption per sector, domestic electric power consumption, energy efficiency), reserves and resources in energy and source materials (evolution of world primary energy consumption, renewable and non renewable energy resources, resources in non-energy source materials), the variability of electrical renewable sources (renewable energies in the French electric power production, notions of intermittency and variability, various renewable productions and issue of lack of sun or wind, bio-energy resources), energy consumption by the French industry (per sector, by the industrial sector, explanation of a decrease of consumption, future energy savings), the definition of efficiency for an energy converter (introduction of criterion of sustainability), energy conversion and life cycle analysis (definition, methodologies, result complexity, case of energetic sectors), agricultural methanization (definition, process, biogas valorisation, situation in France, evolution of the agricultural methanization fleet in France, methanization in Europe, risks related to methanization installations), electricity transport and physical infrastructure (presentation of the French electricity grid, regional and European distribution), sobriety and source material management (consumption of primary resources, definitions of sobriety, situation of recycling for materials and hardware); management of electric power production and distribution (adjustment of production to demand, deployment of energies within the grid, prediction at the service of network management, from alternate towards direct current networks). A memento of energy units is finally provided