(i) Industrial growth in Mumbai:

• Mumbai is the economic capital of India. 
• In earlier days cotton textile industry dominated Mumbai’s economy, but now Mumbai’s economic base is diversified. 
• Textiles industries still remain important, but the city’s industries include petrochemicals, automobile manufacturing, metals, electronics, engineering, food processing, and a wide range of light manufacturing.

(ii) Industrial growth in Pune: 

• From a small university town to IT hub, Pune has changed its face over the years. 
• Numerous automobile manufacturers and ancillary companies have today invested heavily in Pune. e.g. TATA motors, Cummins, etc. 

(iii) Industrial growth in Nagpur: 

• One of the largest industrial estates approximately 6000 Hectares of Asia is located at Butibori near Nagpur. 
• About 47% of Maharashtra State’s power is generated around Nagpur.

 (iv) Industrial growth in Kolkata:

• Industrial growth rate of West Bengal is 1.1% higher than the national average. 
• The growth and development are around the capital city of Kolkata.
• Kolkata is home to many industrial units, major sectors are steel, mining, minerals, cement, etc.