Read the text below and answer the questions that follow.

The concept of "urban farming" has been gaining traction in recent years as a response to several pressing global issues, including food security, climate change, and the disconnect between city dwellers and their food sources. Unlike traditional agriculture, which often requires vast tracts of land far from population centers, urban farming utilizes small, underused spaces within cities, such as rooftops, balconies, and vacant lots, to grow produce.

This innovative approach offers a plethora of benefits. Firstly, it significantly reduces "food miles"—the distance food travels from farm to consumer. This, in turn, cuts down on transportation costs and greenhouse gas emissions. Secondly, it provides residents with access to fresh, nutritious, and often organic produce that might otherwise be unavailable or unaffordable. Moreover, these green spaces can improve air quality, increase biodiversity, and foster a sense of community as people come together to manage the gardens.

However, urban farming is not without its challenges. Limited space, soil contamination in post-industrial areas, and the high initial costs of setting up systems like hydroponics or vertical farms can be significant hurdles. Furthermore, scaling up these projects to a point where they can make a substantial impact on a city's food supply requires careful planning, community buy-in, and supportive municipal policies.