Really big storms are called cyclones, hurricanes or typhoons. One of these ripped into the coast of the Indian state of Orissa in October 1999, killing ten thousand people and leaving millions homeless [1]. This coast used to be protected by mangrove trees which can grow in salty water. The trees used to absorb all the violence of storms. But this natural protection was cut down to make way for shrimp farms. India has lost more than half its mangroves over the last 40 years, especially in Orissa state which raises tiger prawns [2]. These shrimps and prawns aren't to feed the local people: they're for export to rich countries.

Mangrove trees are remarkable and there are several different types. They have roots that can filter salt and leaves that can get rid of salt too. They even help make new land by trapping mud and sand in their roots. Maybe you've seen them in Florida or other tropical places.

1. CARE International
2. New Scientist, 6/11/99, 12: An unnatural disaster
3. Earth Island (source of mangrove tree image) Find out here just how wonderful the mangrove trees and plants really are and why they are among the most threatened habitats in the world