Spaceship Earth

In science class, we are doing a project called spaceship earth. It is where Nasa is having a 20 year voyage where a spaceship and a crew goes deep in space and sees how far they can go. We are the designers to the ship. They are not allowed to bring 20 years worth of anything  so they need to be able to produce everything they need on the ship.

We brainstormed some ideas about how we could do that and we realized that we could take outputs (waste) and turn them into inputs (things you need to survive). For air, we made greenhouses with a lot of trees to cycle carbon dioxide into oxygen. For water, we made water purifiers to turn grey water, into fresh water. For food, we would use solid waste and recycle it into soil to use to grow more food.