What do you think - is it feasible? When it comes to “going green” with construction, there might be a new player in the game, and the method might surprise you. The proposed cure for environmentally damaging, traditional steel and concrete construction is bones. Now, before we upset any vegans, the bone is artificial, created at the University of Cambridge with funding from the US Army Corps of Engineers. Turns out that while much of the world has been concerned with green buildings, there’s a more sinister culprit in the pursuit of sustainability: the actual production of concrete and steel. The means by which the concrete and steel used to build the vast majority of urban dwellings create a massive carbon footprint – even more than air travel, for example. http://blog.agorafy.com/agorafy-blog/bones-new-green-construction-environment-building

The idea that buildings in the future could regenerate to repair themselves, that is the most amazing part I think.

Two things
The "environmental damage" of steel and concrete is very low when calculated over the life cycle of the building.
What will they do when the building develops osteoporosis?

what happens when it develops bone cancer?