Hydroponics is a method of growing plants without soil, using nutrient-rich water solutions instead. This industry involves the cultivation of a wide range of crops, including vegetables, fruits, herbs, and flowers, in controlled environments such as greenhouses, warehouses, and vertical farms. Hydroponic systems can be either passive or active, and can use a variety of techniques to deliver nutrients to the plants, such as drip irrigation, nutrient film technique, and deep water culture. This industry is known for its innovative and sustainable approach to agriculture, as it allows for year-round production, efficient use of resources, and reduced environmental impact.