The Researchers from the University of Edinburgh have observed that most of the trees planted under afforestation schemes are usually for timber or food crops and less effective to meet the environmental goals. The study revealed that natural forest is more 40 times better than plantations trees in improving the air quality by removing pollutants. The mature forests provide lots of benefits, including all the essential nutrients, habitat, and shade. Researcher believes that reforestation schemes require significant research so that projects could deliver desired outcomes.