Additional Joint Collector B. Rama Rao on Tuesday sought proposals from the government departments to declare environmental protection zone around the Coringa sanctuary and Papi Hills national park in the district. Addressing a review meeting here, Mr. Rama Rao stressed the need for protecting the sanctuary and the hills from the environmental pollution, which was the result of industrialisation that was going on in the district on a large scale. He said that there was a need to declare environmental protection zone at least for a radius of 10 km each of the two places. Referring to a recent judgment delivered by the Supreme Court, Mr. Rama Rao stressed the need for submitting proposals at the earliest to district authorities.