Conversation so far:
What was the Sardar Sarovar project about?
Arundhati Roy has campaigned along with activist Medha Patkar against the Narmada dam project.
What was the Narmada dam project that Arundhati Roy was opposed to?
The Sardar Sarovar Dam is a gravity dam on the Narmada river near Navagam, Gujarat in India.

Question: Who was Medha Patkar?
Self-contained rewrite: Who was the activist Medha Patkar?