The United Nations conferences on the environment and development held in 1992 (Earth Summit), 2002 (Johannesburg, South Africa), and 2012 (Rio de Janeiro) focused primarily on: Group of answer choices The benefits of globalization, and more effective ways to exploit workers in developing nations. Reducing the use of nuclear power and focusing on clean coal and natural gas. Sustainable development. The best methods to challenge climate change radicals and keep them off big businesses back