Environment and Transport Minister of Uttar Pradesh, Naseemuddin Siddiqui on Monday appealed to people to use ozone friendly commodities and to keep their environment clean and green. The minister was inaugurating a state-level seminar organised by the Environment Directorate to mark the International Ozone Layer Conservation Day at Sahkarita Bhawan. Mr. Siddiqui said that ozone layer was a natural cover for living beings which saved them from radiation caused due to ultra-violate rays.