Why do poplars grow on the roof of residential quarters?

The reason why poplars grow on the roofs of residential areas may be that the wind blows the seeds of poplars onto the roofs, which provides an environment suitable for the growth of seeds, such as suitable soil, sunshine and water. Poplar is a highly adaptable tree species, which can grow in various environments, including roofs. So in some cases, poplars may grow on the roof of the community.