The first part of this book presents many different types of energy sources exploitable, with their advantages and limitations. The illustrations are numerous, although a bit messy. The second part, on sustainable development and prospects in 2050, is disappointing: the bias in favor of nuclear power too quickly puts aside other energy sources. Worse, it gives the impression of an inexhaustible resource and low emissions (!) Completely passing by discussions on the need to reduce energy costs, and emissions of greenhouse gases! In short, the potential, but needs to be more thorough and nuanced.