For the past several months, Delhi has been witness to a half-hearted government being prodded by a determined Supreme Court to clean the Yamuna. In September 1999, when the court banned the discharge of industrial effluents into the river, several industries along the Yamuna were closed down by the government -- only to be reopened in January. The excuse being that the industries had set up effluent treatment units. Later, the court cracked down again on the industries to ensure that no effluents were being directed into the river