Where was the last Earth Summit held?

Correct option is B

The correct answer is option (B) Rio de Janeiro

• The last Earth Summit, known asRio+20, was held inRio de Janeiro, Brazil, from June 20 to June 22, 2012.
• This conference was officially titled theUnited Nations Conference on Sustainable Development (UNCSD)and aimed to discuss sustainable development and address global challenges such as poverty, environmental degradation, and economic growth.
  

Information Booster :-

• Kyoto: This city is best known for theKyoto Protocol, an international treaty adopted in 1997 that commits state parties to reduce greenhouse gas emissions.
  

• Johannesburg: TheWorld Summit on Sustainable Development took place here in 2002 (also referred to as Earth Summit 2002), focusing on sustainable development efforts since the original Earth Summit in Rio.
• This city hosted theUnited Nations Climate Change Conference(COP18) in 2012, which was significant for climate negotiations but not classified as an Earth Summit.