Los Angeles-based artist Francois Perrin has created a set of structures designed for keeping cool in our warming climate, and hoisted them above the palms at Chicago's Garfield Park Conservatory.

Perrin installed the project named Air Houses: Design for a New Climate for this year's Chicago Architecture Biennial.
His series of shelters, which look like giant silver PG Tips teabags, are designed to keep their occupants cool in hot climatic conditions ? such as those found in the historic conservatory's Palm House.

"When [the biennial artistic directors] invited me, they knew that my work has been dealing with the concept of climate evolution and how architecture can look in the future, and find new solutions of having this dialogue between architecture and nature," Perrin told journalists during a tour of the conservatory.
"I believe the first mission of architecture is to be political, and in this time more than ever... I really wanted to address this evolution of climate, and the way architecture and design tackle this issue, and share it with the public," he added.

Each of the three structures is formed from a metal frame in the shape of a square-based pyramid, but with its base extruded slightly into four smaller triangular planes.
A material woven from thin strands of aluminium wraps all of the faces apart from one of the upper triangles, creating an entrance.

According to Perrin, the fabric reflects sunlight, and keeps out rainwater and wind, ...