Afghanistan, which is about two-thirds mountainous,[1] contains many valleys. The majority of the valleys are located in parts of northeastern, central, southern and southeastern Afghanistan.[citation needed] The southeastern areas are wetter and are covered by forest with trees such as cypress, oak, poplar, pine etc.[citation needed] The valleys are the most populated regions in the country, and much of the agriculture done takes place either in the valleys or on the high plains.[1]
