RRB Group D 1-Dec-2013 Shift 1 Solved Paper

World Environment Day (WED)occurs on 5 June every year,and is the United Nations' principal vehicle for encouraging worldwide awareness and action for the protection of our environment. First held in 1973, it has been a flagship campaign for raising awareness on emerging environmental issues from marine pollution, human overpopulation and global warming, to sustainable consumption and wildlife crime.