Farms under the sea could feed the world in 2050

Agriculture may not be able to feed the extra 2 billion people that are estimated to inhabit Earth by 2050.Quartz News' Erik Olsen dives into the world of aquaculture to find a sustainable food source for the planet. Eating mussels could solve the problem and help the planet — but are we willing to introduce them into our diet?--Quartz is a digital news outlet dedicated to telling stories at the intersection of the important and the interesting. Visit us at https://qz.com/ to read more.Become a member of Quartz, your exclusive guide to the global economy: http://bit.ly/2E7e7jB