They worked to prevent erosion by reforesting with walnut, pine, and spruce trees. Over 400 MPs collected trees, and some publicly committed to accelerate reforesting in the UK. The state began the massive project of reforesting the land. The federal government acquired the land and the CCC began reforesting the area. Abd al-Rahman is principally responsible for reforesting the gardens outside of Marrakesh. This pine is useful for reforesting and provides nourishment for wildlife. He was a co-founder of Reforesting Scotland, a group dedicated to substantial reforestation. Many species were introduced in the Monsanto Hills ("Serra de Monsanto") during the reforesting period. Reforesting efforts have focused on replanting native tree species, versus those used for wood production. Reforesting the area began in 1977 and the park opened to the public in 1982.