This conference is a joint conference between ICGH (International Conference of Gas Hydrates, every 3 yers) and ECGH (European Conference on Gas Hydrate, every 2 years). It will be the opportunity to discuss the challenges and different thematics belonging to Fundamentals, Crystallisation and flow modelling, Dynamics of Natural Systems, Geo-Engineering (Gas production, Carbon Storage, ...), Hydrate based and energy efficient technologies, Hydrates and Astrophysics.