During my summer at Autodesk in 2012 I was exploring the overlap between 3D printing and sustainability. This is an example of using 3D printing for repair, as a way to increase the useful life of a high-embodied-impact product. Here I printed a replacement for part of my bike light mount.
I wrote up a commentary on my results for the Autodesk Sustainability Workshop Blog.
I also have an Instructable on the project.