[hi-druh-PON-iks] Hydroponics dates back to the 1930s, and is the science of growing plants in a liquid nutrient solution rather than in soil.
Using a hydroponic technique, plants are supported in a sterile, inert medium, such as gravel or peat, and regularly nourished with a nutrient-rich solution. Just as the nutrients are controlled by the grower, so too are the air and light-- ensuring optimal production.
Because hydroponically grown vegetables can be planted much closer together than those in the field, hydroponics increases crop production. Hydroponic farmers are also benefited by the lack of weeds and pests, which means they can grow crops pesticide free--healthier for the eater and Mother Earth, too!