List some of the common wastes produced in mining operation and mention how these can be reused.

Describe the procedure usually used to produce compost.

Describe the usefulness of incineration of wastes, and also mention the precautions required in it.

The figure given below represents a device. Study the same and answer the following questions:

(a) Identify the device.

(b) Mention the specific purpose for which we can use this device.

(c) Label the guidelines 1, 2, 3 and 4.

(d) Name another similar kind of device which can also be used for the same purpose.

(e) Draw a neat and labelled diagram of the device mentioned by you in part (4) above.