Demographics
Main article: Demographics of Bangladesh
Apart from very small countries such as Singapore and Bahrain, Bangladesh is the most densely populated country in the world.
The Bangladeshi population is relatively homogenous and consists of about 98% ethnic Bengali, who speak Bengali or Bangla. Urdu-speaking, non-Bengali Muslims from other regions of India such as Bihar, as well as various tribal groups who live mostly in the Chittagong Hill Tracts in the southeast, comprise the remainder.
Most Bangladeshis (about 83%) are Muslims, but Hindus constitute a sizable (16%) minority. There also are a small number of Buddhists, Christians, and animists. Bengali, a member of the Indo-Aryan languages and written in a script similar to Devanagari, is the official national language, but English is generally spoken in urban areas and used in (higher) education and government.
Bangladesh is plagued by overpopulation, while many people are landless and forced to live on and cultivate flood-prone land. Resulting diseases and pollution form a problem, but more pressing is the contamination of ground water by naturally occurring arsenic, caused in part by public health efforts encouraging the drilling of wells as an alternative to using water from contaminated surface water. Arsenic poisoning affects about a quarter of the population.
Culture
Main article: Culture of Bangladesh