Energy transport and conversion are fundamental plasma physical problems having applications in a variety of plasma environments ranging from coronal heating and solar-wind acceleration to Joule heating in the ionosphere. Technologically, understanding the plasma and energy transport properties is a step toward predictions of the space environment. This session focuses on distinguishing the principle mechanisms of energy transport between different plasma systems and conversion between electromagnetic, kinetic, thermal, and non-thermal energies. The main processes related to energy conversion and transport, such as magnetic reconnection, heating, particle acceleration, wave-particle interactions, convection, and diffusion are similar in nature whether they are occurring at the Sun, or in the magnetosphere or ionosphere. However, scientists from these different disciplines rarely gather together to compare the diagnostics that they have developed that might be of use or inspire new methods in other disciplines. We invite quantitative observational in-situ diagnostics as well as theoretical and simulation studies of energy transport and conversion in solar and solar wind plasmas, magnetospheric regimes and in the ionosphere and atmosphere. We aim at a balance between papers on experimental and modeling results, as well as on papers dealing with solar plasmas and Earth environment. Reports on multi-disciplinary studies are especially welcomed.