Activist GD Agarwal, who was on an indefinite fast since June 22 to urge the government to clean river Ganga, died at the AIIMS hospital in Rishikesh yesterday. He was 87. The noted environmentalist had a heart attack. His body is on Darshan today from 10.30am to 4pm, at a field outside AIIMS Rishikesh for people to pay their last respects. After this, his body will be donated to AIIMS.