are mainly wetlands and soft terrains. Wetlands are areas where water covers the soil, or is present either at or near the surface of the soil all year or for varying periods of time during the year, including during the growing season. They can be saltwater, freshwater, or brackish. The most common categories of wetland are marsh, swamp, and peat bog. Soft-terrain is any ground condition that will not support traditional heavy equipment, even a person can't stand in that ground.
