Waste from slaughterhouses dumped by the riverside. KOCHI: The sad tale of abuse of the river Periyar was portrayed at a photo exhibition organised by the Periyar Malineekarana Virudha Samithi at the School of Environment Studies the other day. With photos of a picturesque river turning colours from green to white to red, the exhibition made one realise the monumental abuse happening to the river that is the lifeline central Kerala. Photographer Sai nudeen