You can use fall leaf color to help identify different tree species. Look for these leaf colors on the trees in your neighborhood: (click on the tree species to see the tree shape, bark, fruit, and leaf shape.). 1  Oaks: red, brown or russet. 2  Hickories: golden bronze. 3  Dogwood: purple-red. 4  Birch: bright yellow. 5  paper birch.
Wetlands and people Wetlands and society Wetlands typically offer a wide variety of benefits to society and they have played a central role in human development throughout history. Many great civilizations depended on them, including the Maya, Inca and Aztec in Latin America, the Khmer in Asia, the Marsh Arabs in Mesopotamia and those of the Nile
Humans and River Deltas. Today deltas remain important to humans because they are a source of sand and gravel. In many deltas this material is highly valuable and is used in the construction of highways, buildings and other infrastructure.he upper delta plain is the area nearest to the land. It is usually the area with the least water and highest elevation. The subaqueous delta is the portion of the delta that is closest to the sea or body of water into which the river flows. This area is usually past the shoreline and it is below water level.