How in wind Erosion different from water erosion

Wind erosion is occurred when pieces of the earth are worn away by the strong winds. It occurs in dry bare areas when wind blows and moves the dirt around. ... Water erosion is the process where the piece of earth is worn away by water. It occurs at river banks or streams.

It should be at the center of any map going vertically: the prime meridian, as it passes through greenwich,  england, is considered 0 degrees longitude