Banda Aceh

Banda Aceh

Adek Berry/AFP/Getty Images

Fishermen clean their boats in Banda Aceh. A study in the wake of the 2004 tsunami off Aceh, which killed 220,000 people living near the Indian Ocean, showed that 30 coastal trees per 100 square metres may reduce the flow of a tsunami by 90 percent, according to a 2005 report in the journal Science.