Secretary of State Clinton will lead the U.S. delegation during the Earth Summit 2012 (aka Rio+20) conference, which is scheduled to begin on June 20, 2012.
Unfortunately, many nations' representatives will spend this time explicitly or implicitly defending their inability or unwillingness to reach binding agreements to immediately reduce global green house emissions to sustainable levels. Some key nations will focus on gaining or maintaining a competitive or comparative advantage given the inevitable global climate change and increased weather volatility.
The UN Secretary General is more optimistic
Res: UPDATED 06/17/2012 AN, Science and Innovation Policy Rio+20 UN Conference
UPDATED 06/30/2012 Nature, Wealth gap curbs Rio goals Existing theory and models when fully scaled globally may not perform as expected—global optimization will likely require significant modification to existing theory and models, if not complete abandonment.
UPDATED 06/20/2012 Opening plenary session at RIO+20, Brittany Trilford of Wellington, New Zealand addressed 130 heads of state.
UPDATED 06/17/2012 AN, African nations agree to put a price on nature
VS, 20 years later, still much to debate at green summit