The US is driving a highly lucrative, but unsustainable trade in big-leafed mahogany, says a new report from TRAFFIC, the wildlife trade monitoring programme of the Worldwide Fund for Nature (WWF) and the International Union for the Conservation of Nature (IUCN). According to the report, Mahogany Matters: The US Market for Big-Leaved Mahogany and its implications for the Conservation of the Species the US furniture industry accounts for 60% of the global mahogany trade, causing, in 1998, 57,000 big-leafed mahogany trees to be felled.