Ferns could be the key to a sorely needed low-cost, electricity-free purification system for millions.
Eco-friendly boat allows kids to continuously learn even during heavy floods.
The People of Bangladesh celebrate their New Year by creating the world's largest hand painted design.
A simple plan provides valuable, life-saving information to the poor.
BBC World Service Trust is attempting to harness the power and pervasiveness of mobile phones to provide English language lessons for the 50+ million mobile users in Bangladesh.