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World Environment Day

An aerial view during a media tour by oil company Royal Dutch Shell shows an illegal oil refining site with the runoff from crude oil covering the banks along the Imo river, 30 km (20 miles) west of Nigeria's oil hub city of Port Harcourt, September 22, 2011. Illegal refineries along the Imo river, first discovered in 2009, were cleared in a joint security operation with the government in 2010 but has resurfaced in January 2011, according to a Shell media release during the tour.

World Environment Day

World Environment Day, June 5, which was celebrated annually to raise global awareness about environmental issues and stimulate political action.