A spruce forest attacked by engrave beetles (Scolytidae) is seen at the Czech Republic's Sumava National Park, June 4, 2011. [Photo/Agencies]

A worker inspects harvested timber at a timber processing center in Naklo, June 4, 2011. The timber is cut into proper sizes for transport and exported to an Austrian factory that manufactures wood products. World Environment Day will celebrated on June 5 to raise worldwide awareness for environmental protection and motivate action towards a cleaner and greener future, according to the United Nations Environment Programme website. [Photo/Agencies]