1. C-N-P cycles in agro-ecosystems and impacts on environment 2. Increasing diversity within agro-ecosystem for reducing environmental emissions 3. Heterogeneity within and among agro-ecosystems and dynamics of biodiversity 4. Diversified agro-ecosystem at farm level for more sustainable agriculture production? 5. Socio-economic opportunities for and locking effects against diversification of agro-ecosystems 6. Diversification beyond the farm at landscape and regional level 7. Global aspects