Terai belt of Bihar (Indo-Nepal Border of Bihar) is an agricultural zone. Economically it is a backward zone. It was full of jungles and was popularly known as the 'Paradise of Hunters'. Once upon a time, it was called as 'Kala Pani' due to its bad climatic condition. But after earthquake of 1934, there was a drastic change in its climatic condition and migration of people from different corners of the country started. Slowly urbanization and industrialization begins. In broad sense, there is a drastic change in environmental conditions. It is an agricultural zone and there is abundance of swampy areas. Generally villages are located near agricultural fields or swampy areas. Villages lack proper drainage system. Houses are made up of bamboo and khar and are ill ventilated. Majority of women of weaker section this area work as daily labourer in agricultural fields or brick factories. Education in them is almost negligible. All the studied populations have migrated from Bangaladesh, Nepal as well as from the neighbouring state of India. The main crop of Terai belt is paddy, wheat, maize, jute etc.