Environmental activists Monday threatened to take to the streets if the government did not come out with “concrete measures” to save the “dying” Ganga by May 20. “So many protests have taken place over the issue before but little has come of it... we have decided to launch a mass campaign from Varanasi from May 21 if the government does not come up with a concrete programme by May 20,” said Magsaysay winner “Waterman” Rajendra Singh. Announcing the “Ganga Ganga Mukti Sangram”, Singh accused the Centre of ignoring the plight of the river.