Furniture built from rainforest hardwoods like teak or mahogany has become a mark of environmental insensitivity. But if lumber companies harvested the perfectly preserved trees left under water by dam construction, they could increase the supply of such woods without endangering tropical habitats. So says Gary Ackles, president of Aquatic Cellulose of Vernon, B.C., who has developed a mechanized "aquatic lumberjack" to recover these valuable commodities far more quickly and safely than human divers could. Aquatic Cellulose is harvesting 1,800 square kilometers of trees from a Brazilian reservoir.

Select from the choices above to read the entire article.