Environment reporter, BBC News
A senior UN official has described the world's forests as "fundamental" to human well-being and survival.
Eva Mueller, director of the Food and Agriculture Organization's Forestry Division, said trees provided a direct source of food, fuel and income.
Commenting on the findings of the UN's State of the World's Forest report, she added forests habitats were home to an estimated 80% of global biodiversity.
The report has been published at a UN forestry meeting in Rome, Italy.