This is what I love about cob... you can shape it into what ever you want. You don't have to frame windows in like this half moon window niche
earthship, water recycling system
Green Buildings Systems- Earthships: A fundamental concept of Earthships is that gray water from the sink or tub is recycled and purified by feeding into an indoor planter before being used to flush the toilet. Earthships include their own utilities made on site. An Earthship uses little to no fossil fuels to provide modern amenities. We are simply adapting our needs to the already existing activities of the planet.