Maize and cattle farming, illegal logging and illegal settlements are all contributing to the destruction of the Sierra del Lacandón national park's rainforest.It's the third largest national park in Guatemala, and if nothing is done it will have lost more than half its rainforest within the next 25 years. OroVerde is a German environmental organization that has teamed up with local partners to prevent this happening. Farmers are making an effort to protect the environment with sustainable farming methods, alternative sources of income and reforestation programs.