Which industrial region is known as the Ruhr of India ? Why ?

Mention two advantages of Mini still plants.

From where does the Mumbai Metropolitan Area obtain its power supply ?

What does DPAP stands for ? Name any two states in India affected by it ?

Name any two products which are transported through a pipeline. Mention two advantages  of this method of transport. 

Compare the size of land holdings in China with that in India. 

Explain the following physical features and give an example of each :

a. Doab 

b. Lagoon 

State  two main features of the Japanese method of rice cultivation. 

Discuss any two limitations of tube wells as a method of irrigation. 

Distinguish between the natural growth of population and migratory growth of population.