See also https://placesjournal.org/article/informal-settlers-environmental-rehabilitation-manila/ https://placesjournal.org/article/informal-settlers-environm..

See also https://placesjournal.org/article/informal-settlers-environmental-rehabilitation-manila/ https://placesjournal.org/article/informal-settlers-environm... (discussion at https://news.ycombinator.com/item?id=32726036 https://news.ycombinator.com/item?id=32726036), describing how one local-run tree-planting operation has succeeded where government and NGO-run prestige projects failed.