In this week's comments update, readers are discussing No Footprint House in Costa Rica and sharing their views on other top stories. More about "It's co-existence and survival of the fittest" says architect
Architecture studio Spark has developed a concept for an easily transportable 3D-printed toilet that could convert human waste into electricity. More about Spark's Big Arse toilet could generate electricity in remote Indian villages
This prefabricated family home in Princeton, New Jersey, by local architect Marina Rubina was conceived as an "experiment" in providing a high-quality residence that is sustainable and affordable (+ slideshow). More about Prefab house in Princeton by Marina Rubina was built in one day