Explanation: United Nations Conference on Environment and Development (UNCED) Also known as the Rio Summit, Rio Conference, Earth Summit held in Rio de Janeiro in June 1992. The issues addressed included:

• Systematic scrutiny of patterns of production — particularly the production of toxic components, such as lead in gasoline, or poisonous waste including radioactive chemicals
• Alternative sources of energy to replace the use of fossil fuels which are linked to global climate change
• New reliance on public transportation systems in order to reduce vehicle emissions, congestion in cities and the health problems caused by polluted air and smog
• The growing scarcity of water

The Earth Summit resulted in the following documents:

• Rio Declaration on Environment and Development
• Agenda 21
• Forest Principles

Source: SHANKAR IAS Environment