GM foods are classified into one of three generations. First-generation crops have enhanced input traits, such as herbicide tolerance, better insect resistance, and better tolerance to environmental stress.
Types of systems. There are multiple systems by which water treatment systems companies can remove contaminants from water. Point of entry systems: Point of entry water treatment systems are able to treat all of the water entering a home or business and are installed after a water meter or storage tank.
Biological Water Filtration in Pozzo, Pavia. Biological treatments, which use organisms to break down organic substances in wastewater, are widely used around the world. Unlike other wastewater treatments, which use only mechanical or chemical processes, biological treatments include the use of bacteria, nematodes, or other small organisms.