Kabiru Yammama , leader of Nigeria’s National Forest Conservation Council has indicated that the northern part of the country is already largely deforested, and 35% of arable land in the region has been lost to desert.  He stated, “Considering the rate at which trees are chopped down
without any regeneration efforts. all of Nigeria's forests will disappear by 2020.” 

http://afp.google.com/article/ALeqM5jM-Z4a6gJHbcdxwornY5BJ6lQNjA