3D printing is the computer-controlled serial layering of materials to form three-dimensional shapes. Computer-aided design (CAD) or a 3D scanner are used to build a 3D digital model of the item.

Sewage water is wastewater from households, businesses, and possibly pre-treated industries. Nature has an amazing ability to manage small amounts of wastewater and pollutants incredibly well, but it would be overwhelming if we did not handle the huge amounts of gallons.