<P> The United Nations Conference on Environment and Development (UNCED), also known as the Rio de Janeiro Earth Summit, the Rio Summit, the Rio Conference, and the Earth Summit (Portuguese: ECO92), was a major United Nations conference held in Rio de Janeiro from 3 to 14 June 1992 . </P> <P> More than 100 heads of states met in Rio de Janeiro in Brazil...Earth Summit was created as a response for Member States to cooperate together internationally on development issues after the Cold War . Due to conflict relating to sustainability being too big for individual member states to handle, Earth Summit was held as a platform for other Member States to collaborate . Since the creation, many others in the field of sustainability show a similar development to the issues discussed in these conferences, including non-governmental organizations (NGOs). </P>

First earth summit 1992 was held at which country