(AGI) Rho (Milan), June 5 - Milan Expo 2015 celebrated UN WorldEnvironment Day on Friday in the presence ofUnder-Secretary-General and United Nations EnvironmentProgramme (UNEP) Executive Director, Achim Steiner. Mr Steinerchose the World Fair for this year's event on the theme of"Seven billion dreams. One planet. Consume with care". The daywas also marked by a visit to the exhibition site of ItalianPresident Sergio Mattarella. Proceedings were officially openedin the afternoon with a video message from UN Secretary GeneralBan Ki-Moon, who called on people to "think about theenvironmental consequences of what we do", becoming "guardiansof our planet". Alongside Mr Steiner, EnvironmentMinister Gian Luca Galletti wanted to "reaffirm on behalf ofItaly and the government its continuing and convinced supportfor UNEP and the firm belief in the need to continue tostrengthen the role of the leading global environmentauthority, particularly in this crucial year for decisiontaking". Minister Galletti called attention to the"unsustainable consumption patterns that are becomingincreasingly widespread throughout the world, with threebillion new middle-class consumers who will help expand theglobal population by the year 2030. In the face of theseserious imbalances we have a duty in the face of presentchallenges and those of future generations to seize theopportunity for change offered by the big and multi-dimensionalinternational forum of Expo 2015". (AGI) . .