Bihar, Orissa and West Bengal produced 90 percent of coal in India.

Uttar Pradesh has the largest number of district in India.

Among the rice producing states, West Bengal is by far the most important producer and ranks the leading position, accounting for about 15 per cent of the total quantity of rice produced in India. The major rice producing districts in the state are Bardhaman, Medinipur, North and South 24 Parganas.

Netaji Subhash Chandra Bose International Airport located at Kolkata.

The maximum increase in forest cover has been observed in West Bengal (3810 sq. km.) followed by Odisha (1444 sq. km.) and Kerala (622sq km). Madhya Pradesh has the largest forest cover of 77,522 sq. km. in terms of area in the country followed by Arunachal Pradesh with the forest cover of 67,321 sq. km.

The capital of Uttar Pradesh is Lucknow.

Mahanadi, Cauvery, Ganga and Godavari fall into The Bay of Bengal.

Nickname of Kolkata are City of Joy, City of Palaces, Cultural Capital of India, Gateway of Eastern India and Haven of Aged.

Kolkata is the capital of the Indian state of West Bengal. Located on the east bank of the Hooghly River, it is the principal commercial, cultural, and educational center of East India, while the Port of Kolkata is India's oldest operating port and its sole major riverine port. In 2011, the city had a population of 4.5 million, while the population of the city and its suburbs was 14.1 million, making it the third-most populous metropolitan area in India. Recent estimates of Kolkata Metropolitan Area's economy have ranged from $60 to $150 billion (GDP adjusted for purchasing power parity) making it third most-productive metropolitan area in India, after Mumbai and Delhi.

The Mahanadi is a major river in East Central India. It drains an area of around 141,600 square kilometres (54,700 sq mi) and has a total course of 858 kilometers (533 mi). The river flows through the states of Chhattisgarh and Odisha.