Transport between India and Bangladesh two governments moved slowly on implementing a 1980 agreement on improving transport links. In the 1990s, the Indian and Bangladeshi governments collaborated to open bus services between Kolkata, the capital of West Bengal and one of the largest cities in India, and Dhaka, the capital and largest city of Bangladesh. In 2001, another bus service was launched to connect Dhaka with Agartala, the capital of the Indian state of Tripura the second largest city of Northeast India that borders Bangladesh in the east. Since the 1980s, the Indian and Bangladeshi governments have sought to negotiate an agreement permitting commercial vehicles
Tourism in West Bengal which is 13.38% of the state's geographical area, compared to the national average of 21.02%. Part of the world's largest mangrove forest, the Sundarbans, is located in southern West Bengal. The southern part of West Bengal can be divided into two regions: the Gangetic plain and the littoral mangrove forests of the Sundarbans. The coastal region of Purba Medinipur exhibits coastal vegetation. A notable tree from the Sundarbans is the ubiquitous "sundari" ("Heritiera fomes"), from which the forest gets its name. The distribution of vegetation in northern West Bengal is dictated by elevation and precipitation. For example, the foothills of