Closed-loop systems, in which waste is used as a nutrient (usually) could well be one of the futures of farming:
City-wide hydroponic rooftop farming co-operatives have the potential to become the next big thing in commercial agriculture.
A solar power hydroponics system relies on solar panels to provide electricity for pumps and lights, which are used to control the flow of water and light to the plants. Let’s know more about this technique below.