- A 100-foot (30-metre) massaranduba tree slowly falls toward the Amazon floor, cutting a thick gash through the dense tropical jungle and landing with a deafening roar. The massaranduba tree, which has wood that is rose coloured when first cut but later turns a plum red, was carefully selected and cut in such a way that it would fall in an area where it would hurt few other trees or seedlings. This is environmentally friendly logging by Brazil's Mil Madeireira forestry company, a model held up by conservationists this week in their fight to stop the devastation of the world's largest tropical rain forest. But as hardwood buyers and sellers gathered in Brazil's steamy Amazon capital Manaus to seek ways to preserve the nation's vast rain forests, it was clear that demand for wood from environmentally friendly sources far exceeded supply.