AHMEDABAD: The recommendations for a cleaner and sustainable environment compiled at the Centre for Environment Education (CEE), Ahmedabad will be presented at the United Nations Conference on Sustainable Development called 'Rio +20,' which will be held in Rio de Janeiro in June. The recommendations at CEE have been developed by a team of around 80 children and youth from across the world at an event called 'Asia-Pacific UNEP TUNZA Children and Youth International Conference'.