The Lilypad is a project for the Climate Refugees – A Floating Ecopolis For Climate Refugees. It is a solution for the water rising, each floating cities designed to hold around 50,000 people. Lilypad travels on the water line of the oceans, from the equator to the poles following the marine streams warm ascending of the Gulf Stream or cold descending of the Labrador. And it is a a prototype of auto-sufficient amphibious city. It enables to live in the heart of the subaquatic depths. It also feature with green technologies(solar, wind, tidal, biomass), the double skin is made of polyester fibres covered by a layer of titanium dioxide (TiO2) like an anatase which by reacting to the ultraviolet rays enable to absorb the atmospheric pollution by photocatalytic effect.