Since 2011, the Think Tank and Civil Societies Programme at the University of Pennsylvania has ranked ATREE among the top 20 environmental think tanks in the world.
![](http://20.219.39.233/atree/wp-content/uploads/2023/09/TTCSP_0.png)
Since 2011, the Think Tank and Civil Societies Programme at the University of Pennsylvania has ranked ATREE among the top 20 environmental think tanks in the world.