Man was always eco-friendly since ages, else we would'nt have sustained till date. In fact what has changed our environment is just a story of one and a half century of development and industrialisation.This means that the tribes, who still dwell in many of the forests across the globe, would have had the best life-style, much suited in preserving and protecting our enviroment. Can you identify some tribal practices which could be modified and used now, so that we all can lead a sustainable life?