Question

which source of raw materials used in secondary occupation ​

Answer 1

Answer:

Such industries use natural chemical minerals, e.g. mineral-oil (petroleum) is used in petrochemical industry. Salts, sulphur and potash industries also use natural minerals. Chemical industries are also based on raw materials obtained from wood and coal. Synthetic fibre, plastic, etc.

- Devraj Sankla

Answer 2

Answer:

which of the following is a secondary source of raw material