1) The United Nations Conference on Environment and Development (UNCED), also known as the Rio Summit, Rio Conference, Earth Summit was a major United Nations conference held in Rio de Janeiro from 3 June to 14 June 1992. 2) The UN. 3) From the 3rd of June to the 14th of June 1992. 4) It was first held in Rio de Janeiro. 5) The last Earth Summit was held in 2002 in Johannesburg, South Africa 6) . 7) They make decisions like how do reduce pollution] 8) It makes us all aware of what is happening in the world and how we can help to conserve our planet. 9) Yes it made world leaders aware of what is actually happening in the environmental world around us 10)