Philadelphia

Urban action, global change

In 1800, less than 5% of the world’s population lived in urban areas; by 2050, this figure will hit 70%. As more and more people turn to urban ecosystems to…

Changing the code

Each article in our Design Details series focuses on a single innovation from a design project. For our first post: the Philadelphia fire stair that wasn’t. ** Although their work is typically visible only in…