The British city of Bristol has unveiled one innovative and sustainable solution for tackling housing shortages and homelessness. It has installed a series of modular homes on a brownfield site — above a public parking lot. The Zed Pods offer affordable and energy-efficient living. Residents enjoy low rent and strong community ties. Solar panels and heat pumps provide renewable energy. Built off-site with minimal waste and inclusive employment for offenders, the low-carbon homes tackle many problems at once. With 22,000 people on its social housing waiting list and 10% population growth in the past decade, the UK city is hoping that smart design can help make a difference.