New Delhi, June 28, 2012: The recent dredging exercise at the Okhla barrage to deepen the Okhla pond was welcomed by environmentalists till they figured out that all the silt pulled out was being dumped along the banks and allowed to flow downstream with the river. "For one thing, it is a complete waste of money and time to desilt the river and then allow the silt to flow back into it. For another, the silt would have contained high levels of toxins considering how polluted the river is, so it was the government's responsibility to ensure that it was dumped at a safe location," said Manoj Mishra of Yamuna Jiye Abhiyaan.