Bolivian President Evo Morales has signed a controversial new bill which almost doubles the area of land that can be used for legal coca production.
The new law expands the country's authorized coca plantation zones to 22,000 hectares (55,000 acres) from the previous 12,000 hectares.
The coca plant has many traditional uses in the Andes, including as a remedy for altitude sickness. When chewed, its leaves also provide mild stimulation and can suppress thirst and hunger.
However, the plant is also used to make cocaine, prompting warnings from opponents that the new law would boost drug trafficking – a crime which has long since weighed on the country.
President Morales, a former coca farmer, is a renowned supporter of the legalization of the coca leaf chewing and heads a federation of coca farmers.