Which of the following preventive measures is depicted by the symbol?

1. No parking zone
2. No smoking zone
3. No plastic zone
4. No horn zone

NEERI stands for

1. National Environmental Engineering Research Institute.
2. National Ecological Environmental Research institute.
3. Natural Environmental Ecological Research Institute.
4. Nation's Environmental Economical Research Institute.

The following symbol is used in aircraft for

1. No talking
2. No movement
3. No smoking
4. No sleeping

Give reasons for the following:

Car pooling is often encouraged by the authorities.