Our planet is haemorrhaging natural resources at an alarming rate. Biodiversity is under threat as forests are felled, wild animals illegally hunted. Stephen Sackur speaks to Lee White, newly appointed Environment Minister in the West African state of Gabon. He is on the front line of the effort to conserve and protect what remains, in a country famed for its tropical forests, its elephants and gorillas, but also notorious for systemic corruption and inequality. Can Gabon find a sustainable balance between the needs of man and nature?