We’ve looked at a whole bunch of amazing ideas this season. We’ve met people tackling global problems, including rising temperatures, water shortages, rainforest destruction, and greenhouse-gas emissions. But one environmental challenge we can’t skip over is rising sea levels. Global warming has caused unprecedented levels of ice and glacier melt over the last few decades. No matter how much we reduce our carbon emissions, sea levels are on course to rise at least a foot by 2050. That’s a scary statistic even before we think about the fact that almost three-quarters of the world’s population live within 50km (or less than 1 mile) of the sea. On this episode, we dive into water homes—how they’re built and when we’ll be able to move into one!

• Koen Olthuis is the cofounder and principal architect of Waterstudio
• Grant Romundt is the cofounder and CEO of OceanBuilders