Question

what was the first international earth summit

Answer 1

The United Nations Conference on Environment and Development (UNCED) also known as Rio de Janeiro Earth Summit was the first Earth Summit from 3 to 14 June 1992

Answer 2

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.