Namibia: For trees, against monoculture

Large-scale tree planting on agricultural land can save those primary forests, agroforestry experts argue. But the new plantations are detrimental to biodiversity and indigenous people, critics respond. Professor P K Nair, director of the Centre of Subtropical Agroforestry at the University of Florida, believes planting trees on farmland is the way to conserve what's left of the world's rainforests.