Head over to GOOD to read this awesome article about sustainable hydroponic farming in urban environments.

Did you know that due to food consumed in urban areas being grown in non-urban areas, the U.S. food system uses 10 nonrenewable fossil fuel calories to produce only one food calorie? Or that most traditional hydroponic farms can’t grow organic food due to the fertilizers being petroleum-based? These are just some of the points explored within the article, which also introduces an interesting idea to make urban farming more sustainable – use the hydroponic system as a habitat for fish, and their waste as nutrients for the food, allowing the growth of organic food in a hydroponic city farm.