Cooler cities and less environmental footprint
Courtesy - The RUAF Foundation
Farming and cultivating a vegetable garden on rooftops of buildings.
Creates a cooler city environment by absorbing heat, can avoid floods by absorbing water, can even reduce air and noise pollution.
Also reduces the footprint of food by taking less carbon emissions for food to travel from place to place – everything is produced and consumed within the same close area.
Valuable not only for its production but also for health benefits, social benefits and environmental conservation.
See this very detailed manual for different types depending on the environment.
Need a flat rooftop area. Choose your different plants based on how big your space is. You need to build enclosures and make sure the soil is actually separated from the surface of the rooftop. You will also need organic fertilizer to put on your plants.
Plant your plants in the right season and tend to them based on their water needs. If your area gets a lot of sunlight, you may need to put a shade cover over the garden.
Make sure to keep checking levels of nitrogen and adjusting your fertilizer/compost to suit.