Money trees: U.S. cities find new ways of valuing urban forests →
In the face of a warming planet and breakneck urbanization, U.S. policymakers are asking how best urban trees can be protected and utilised. PLACE
Read MoreU.N. plans vast urban forests to fight climate change
The U.N. plans to work with Britain's Kew Royal Botanic Gardens to grow forests in 90 cities across 30 countries in Africa and Asia. THOMSON REUTERS FOUNDATION
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