Mangroves, coral reefs and sand reefs are under immense pressure from poverty, population growth and economic development. Filmed in India, Indonesia, Sri Lanka and Thailand - four countries worst hit by the Tsunami - documentary looks at conservation activities by communities, researchers and activists. (9:23 mins)
Human and natural factors exert many pressures on coral reefs. A group of young divers is regenerating one damaged reef, giving nature a helping hand.
Greenbelt tells why the modest mangrove is actually mighty. Advised by scientists, coastal communities such as in India are restoring or replanting mangrove forests as a 'bio-shield' against natural disasters and sea level rise.