This document discusses aquaponics, which is a sustainable food production system that combines aquaculture and hydroponics. Aquaculture involves raising aquatic animals like fish in tanks, while hydroponics is the cultivation of plants in water. Nutrients from fish waste feed the plants, while the plants naturally filter the water for the fish. Some benefits of aquaponics include being able to grow food year-round, healthier plants in a controlled environment, fish that live and reproduce happily, and homegrown food that tastes better. The document lists some top crops for aquaponics like lettuce, herbs, peppers, and tomatoes. It also discusses using aquaponics for growing houseplants, which can improve indoor air quality.