Jun Kamei, graduate of the Royal College of Art, designed artificial gills using 3D printing. They consist of a gill and a respiratory mask, and it lets people breathe underwater. Mr. Kamei has built a working prototype, and it successfully extracts oxygen from water, and releases carbon dioxide back out. Right now it doesn’t product enough oxygen for a human though. His idea was that artificial gills would be essential in the future when the ocean rises due to climate change.
By 2100, a temperature rise of 3.2 degrees celsius is predicted to happen, causing a sea-level rise affecting between 500 million and three billion people, and submerging the megacities situated in the coastal areas.