Right now we’re living in the middle of a climate crisis and a housing crisis (oh, and a pandemic). Smaller spaces — like houses that are 400 square feet and less — could help us address both. Here’s how.

Photojournalist Kitra Cahana has lived on the road since she was young, the oldest in a family of five with parents who often traveled for months on end. Here, the TED Fellow shares photos from her series about homeless living in the United States.