This sub thematic literature review has been undertaken with valuable suggestions, critical support and words of motivation from a number of people: Nirmala Karunakaran of Greenpeace helped source valuable books, Ghazala Shahabuddin of Chintan helped wade through the papers and participate in discussions about them, Ravi Singh edited the report at short notice, Pranay Lal, of the Centre for Science and Environment rummaged at short notice through his desk top to add on new materials, Madhu Datta offered a Sunday and an important new study, Subhash Kumar (Delhi University), Dr. Anand Ramnathan and Rakesh Kumar Singh (Wildlife Trust.