The case of the Maya Biosphere Reserve (MBR) in Peten, Guatemala is illustrative (a & b above). Forest loss in Peten’s protected areas drive the national trend through the mid-2000s. While wilderness refuges, biosphere reserves and the UNESCO-designated core of the MBR suffer heavy forest losses during this period, overall, national parks are the biggest forest losers. During the same period, however, communally-managed forest concessions register very low forest losses (see rectangular polygons just northeast of the center, fig. a, b). Secure, long term local control over forests is key for preventing further emissions from narco related deforestation, as this example shows.