Trees and Urban Cities By: Isela Quijas and Ryan Ashburn PREV NEXT Cities and trees have a symbiotic relationship. In ‘Trees and Urban Cities’ Isela Quijas and Ryan Ashburn explain why cities have a lot to gain from trees and forests. Related Stories from our Blog View all 20 April 2015 Health is in the dish: bush meat or tinned meat? 4 August 2015 Counting trees: 143 scientists just did 3 March 2015 Link between wildlife, human nutrition is food for thought for development in Africa 12 March 2015 In hunt for resources, Congo forest communities feel the squeeze, early research shows