How many TreeHugger hot buttons can be pushed in one post? After Toronto cyclist Charles Prinsep was killed in 2007 while riding across the country, his friends set up Charlie's FreeWheels. It takes kids at risk in Toronto's roughish Regent Park and teaches them to fix bikes.

TreeHugger has often discussed the use of screens or shutters to keep the sun out while providing ventilation and privacy.

Images: Green Building Advisor

Image credit: The Guardian

From tiny kitchens to moving walls in a transformer apartment, TreeHugger loves small living spaces.

They said it couldn't be done. When we first wrote about the almost invisible treehouse to be built in Sweden by Tham & Videgard, 899 commenters thought it was autocad eye candy, impossible to build and death for birds.

LEGO CNC milling machine & open source robotic arm. Image credit: Marta Malé-Alemany.

Meet George Jetson: (FAB)BOTS are robots or machines that fabricate structures and spatial formations for architecture.

Image: Marks Barfield

The historic city of Cambridge, UK will soon be home to Europe's first real eco-mosque.

Images: Alex Farmer

Compact, efficient and optionally mobile, micro-dwellings have been around for some time.

Images: Be Palettø

We've sung the praises of the humble shipping pallet as an amazingly versatile building component before (take a look at Lloyd's comprehensive roundup).

All images via www.designboom.com

This amazing pavilion designed by students at Chelsea College of Art & Design has been on show during the London Festival of Architecture for the last couple of weeks.