Step 1: Identifying the Key Concept:
The prompt requires identifying the UN commission responsible for popularizing 'sustainable development'.
Step 2: Commission Details:
The World Commission on Environment and Development (WCED), established by the UN in 1983, is the answer. Chaired by Gro Harlem Brundtland (former Norwegian Prime Minister), it's commonly called the Brundtland Commission.
Its purpose was to create a global plan to address environmental concerns and their link to economic and social development.
In 1987, the commission published "Our Common Future", which introduced and popularized the widely-used definition of sustainable development:
{"Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs."}
Step 3: Option Analysis:
(A) Copenhagen: Incorrect. The Copenhagen Accord relates to a 2009 UN Climate Change Conference, not sustainable development's origin.
(B) Brundtland: Correct. Refers to the Brundtland Commission.
(C) Onio: Incorrect. No major UN environmental commission is named "Onio."
(D) Kyoto: Incorrect. The Kyoto Protocol is a 1997 treaty on reducing greenhouse gas emissions.
Step 4: Conclusion:
The Brundtland Commission is the commission that introduced the concept of 'sustainable development'.