Milan, Italy. 5th june, 2015. Achim Steiner, general undersecretary of the UN and executive director of United Nations Environment Program (UNEP), speaks at Expo 2015 for the opening ceremony of the World Environment Day. This year’s theme is “Seven billion dreams. A with moderation”. Credit: Sandro Tomada/Alamy Live News

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Photo credit: © Sandro Tomada / Alamy / Afripics
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Keywords: 2015, achim, ceremony, day, environment, expo, milan, opening, steiner, undersecretary, unep, world