Urban agriculture takes many forms, among them community, school or rooftop gardens, commercial urban farms, and hydroponic or aquaponic systems. These activities have been shown to promote sustainable cities in a number of ways. They enhance local food security and foster economic opportunities through small-scale farming initiatives. They also strengthen social cohesion by creating shared spaces for collaboration and learning. Urban agriculture takes many forms, among them community, school or rooftop gardens, commercial urban farms, and hydroponic or aquaponic systems. These activities have been shown to promote sustainable cities in a number of ways. They enhance local food security and foster economic opportunities through small-scale farming initiatives. They also strengthen social cohesion by creating shared spaces for collaboration and learning. Social Sciences Phys.org – latest science and technology news stories