Radical goals for 2020 boost renewable energy and cut emissions sharply.
Scientists and politicians are moving to protect the enormous biodiversity in the Coral Triangle – a critical marine nursery for tuna and other species.
Two Turkish villages illustrate the impact of radically different approaches to development.
Critics say fish farms are depleting stocks by caging tuna for fattening before they've had a chance to spawn.
Overfishing on the Mediterranean is threatening artisanal fishermen and endangering more than 100 marine species.