3 links have been added on this idea.
  1. Urban gardens aren’t just suitable for food production; they also help make cities greener and combat air pollution.

  2. Vertical urban gardens are an ancient but very effective concept which will become popular again as the population of people living in urban centres continues to increase.

  3. Global food insecurity has reached alarming levels, with millions of people going hungry worldwide. However, innovative solutions such as #verticalgardens in cities can help curtail the problem.
    https://www.wfp.org/global-hunger-crisis