Global warming is real and Vincent Callebaut wants to do something about it. The architect recently unveiled his 3D renderings for 'Auquorea' - an eco-friendly water civilization situated off the coast of Rio de Janeiro. The underwater city promotes sea life by being energy self-sufficient, recycling all waste, and fighting ocean acidification. 'Aequorea' could house up to 20,000 people and feature modular living, co-working spaces, recycling plants, science labs, hotels, sports fields, farms, and phyto-purification lagoons. We have a feeling we'll never see this actually come to fruition, but the concept is pretty amazing. View more incredible mockups below and click here for more info via Vincent's website.