In Namibia, a project is hoping to solve two issues for the price of one: Make use of a pesky plant known as the encroacher bush and help deal with the country’s housing crisis. By harvesting the water-intensive weeds that encroach on farmland and combining them with a mushroom byproduct known as mycelium, MycoHAB founder and architect Chris Maurer says bricks can be created to build homes. The World’s host, Carolyn Beeler, spoke to Maurer to learn more.