The First International Earth Summit was held in 1992 at:

1. The UN Conference on Environment and Development (Earth Summit) was held at Rio de Janeiro, Brazil, in June 1992. 2. Agenda 21 was adopted — a blueprint for sustainable development. 3. Stockholm (1972) was the first UN Conference on Human Environment; Kyoto (1997) and Paris (2015) addressed climate change. _Source: NCERT Class 10 SST Geography Ch 1 §1.3 Sustainable Development_