France recently passed a law that says that all new rooftops must have either plants or solar panels on top. There are lots of benefits to this law because it is environmentally sustainable. Solar panels create a green source of energy and save power and land by using renewable resources. Plants would absorb rainwater which helps with runoff water and cleans the atmosphere of toxic chemicals and adds oxygen back to the atmosphere, helping to reverse the greenhouse effect.
This article is related to cities and urban land use through the use of rooftops in urban areas to reduce the environmental effects of urbanization. The urban areas are rather crowded in general and there is not much room for solar panels/ plants. By thinking up and using the rooftops, space is created and greater planning is employed in the use of urban land.