{Energy-producing blocks embedded under public spaces such as train stations and plazas that convert pedestrian congestion into electric current}
The Canadian Centre for Architecture (CCA) presents the exhibition Actions: What You Can Do With the City, an exhibition with 99 actions that instigate positive change in contemporary cities around the world. Seemingly common activities such as walking, playing, recycling, and gardening are pushed beyond their usual definition by the international architects, artists, and collectives featured in the exhibition. Their experimental interactions with the urban environment show the potential influence personal involvement can have in shaping the city, and challenge fellow residents to participate.
Actions: What You Can Do With the City documents and presents specific projects by a large and diverse group of activists whose personal involvement has triggered radical change in today’s cities. These human motors of change include architects, engineers, university professors, students, children, pastors, artists, skateboarders, cyclists, root eaters, pedestrians, municipal employees, and many others who answer the question of what can be done to improve the urban experience with surprising and often playful actions.
A few I'm particularly fond of are #9, #82, and #95. Take some time and peruse the site, many compelling ideas for interactional infrastructure and community initiatives in urban agriculture.