get out before were pointed out but are not. the technique used to revive barren land focuses on the network of tree roots that lie underneath the dry ground. villages from yemen regan months regularly trim new shoots growing out of old stumps and it's hopes that these saplings will eventually grow into tool trees. divider you know runs down the villa we cut the insurance but leave to go on the square just want to do what we call some way he uses firewood. the advantage of planting new trees is that the fruit several ready deep in the soil so even if it rarely rains they can tap into the ground water. or to grow enough saw oil expert tony right now dale has developed this method known as farmer manage natural regeneration he's working across africa with the aid organization