THE richness of life in an old-growth rainforest is something we take for granted. Where it is gone, you find heat, mud, and debris. Bird songs and calls of gibbons are replaced by an eerie silence or the distant hum of machinery. In place of ancient dipterocarp trees, you see vast stretches of land cleared or replaced by industrial acacia or eucalyptus plantations. The signs of large-scale logging have dramatically changed our landscapes.