Describe the two groups of industries based on the source of raw material. Write an example of each of these industries along with the major centres of each from India.
1. Agro-based industries obtain their raw material from agricultural sector e.g., Cotton textile industries and an important centre is Ahmedabad.
2. Mineral-based industries obtain their raw material from mining sector e.g., Iron and steel industry and the important centre is Bhilai.