There are more than 600 species of birds. Bangladesh also has the largest number of fresh water fish in the world. Economy Bangladesh is one of the world's poorest, most densely populated, and least developed nations. The economy is largely agricultural, with the cultivation of rice the single most important activity. Major impediments to growth include frequent cyclones and floods, a rapidly growing labor force that cannot be absorbed by agriculture, inadequate power supplies, and slow progress towards various necessary reforms.
Natural hazards remain a major worry.
Recently, severe floods, lasting from July to October 1998, endangered the livelihood of more than 20 million people.