Discolouration of water of the Periyar River, Kerala has continued unprecedently, thus raising concerns among environmentalists. Environmentalists allege that that discolouration was caused due to excess discharge of chemical wastes into the river by industries located on the banks. The Periyar River is the longest river in Kerala. It originates from Sivagiri Hills of Western… Continue reading No end to discolouration of Periyar