More than half the rubbish in developing countries' cities is dealt with by informal waste pickers. In India they are "untouchables", part of the lowest social group, and largely overlooked by the people they serve. But in Bangalore that is changing. Waste pickers who sign up with 'Hasiru Dala', or Green Force, now have uniforms, ID badges, and access to training. The woman behind the change is Nalini Shekhar. For over 30 years she has been helping India's marginalised communities.
(Nalini's interview is part of a longer broadcast; her interview starts at 17 minutes.)