The document discusses the history and key concepts of sustainable development: 1. The Brundtland Commission in 1983 first proposed strategies for sustainable development, defining it as development that meets present needs without compromising future generations' ability to meet their own needs. 2. Major UN conferences on sustainable development include the 1992 Rio Earth Summit that produced agreements like Agenda 21 and the UNFCCC. 3. Sustainable development involves balancing social, economic, and environmental concerns, and requires ongoing efforts across many sectors of society.