During the early stage of afforestation in Hong Kong, some exotic tree species, such as Acacia confusa in the picture, were introduced to prevent soil erosion.

During the early stage of afforestation in Hong Kong, some exotic tree species, such as Acacia confusa in the picture, were introduced to prevent soil erosion.

During the early stage of afforestation in Hong Kong, some exotic tree species, such as Acacia confusa in the picture, were introduced to prevent soil erosion.