The participation of small States in Rio+20, next year’s United Nations conference on sustainable development, is vital, given many are already experiencing the effects of climate change, General Assembly President Nassir Abdulaziz Al-Nasser said today. Speaking to the Forum of Small States (FOSS) in New York, Mr. Al-Nasser said the conference would provide a great opportunity for small countries to contribute their ideas and proposals on climate change and sustainable development.