Will planting Causarina give protection against another tsunami?

Ever since the 2004 tsunami flattened coastal villages, the Tamil Nadu government has been raising sea walls and protective plantations on a priority basis to blunt the impact of sea waves. It touts the plantations as the first line of defence against tsunamis and cyclones. Ecologists warn it could be a step towards another kind of disaster.

The problem is not planting a shield of trees or