From the pine trees in southern Europe to the spruce forests near the Arctic Circle, about 25 million cubic meters of wood are wasted every year in Europe. But now researchers are looking at new ways of making each felled tree traceable. One method uses tags containing a Radio Frequency Identification transponder. Another method uses special ink. Tracability saves time and improves efficiency, meaning wood is best used and more forests are preserved. It also improves efficiency meaning that consumer prices are lower.