The house's large, double-glazed windows are used to bring sunlight and warmth into the structure in the winter. Sliding walls of vertical planters act as shading devices in the summer.  Photo 1 of 6 in The World's First Carbon-Positive Prefab House by Allie Weiss

The World's First Carbon-Positive Prefab House

1 of 6

The house's large, double-glazed windows are used to bring sunlight and warmth into the structure in the winter. Sliding walls of vertical planters act as shading devices in the summer.