Explanation:

Piped Natural Gas (PNG) for Cooking:
Piped Natural Gas (PNG) is primarily used for cooking purposes in households. It is a convenient, safe, and efficient alternative to traditional cooking fuels like LPG or wood.

Advantages of using PNG for cooking:
- Environmentally friendly: PNG is a cleaner fuel compared to other traditional cooking fuels, reducing harmful emissions and contributing to environmental conservation.
- Cost-effective: PNG is often cheaper than other fuels, making it a cost-effective option for cooking.
- Convenience: With a continuous supply of PNG through pipelines, there is no need to worry about refilling cylinders or running out of fuel.
- Safety: PNG is a safe fuel as it is lighter than air and disperses quickly in case of a leak, reducing the risk of accidents.

How PNG is used for cooking:
- In households connected to the PNG network, a gas pipeline is installed that delivers natural gas directly to the kitchen.
- The gas is used in cooking stoves or ovens for preparing meals.
- PNG provides a consistent flame and temperature, allowing for precise cooking control.

Conclusion:
In conclusion, Piped Natural Gas (PNG) is primarily used for cooking purposes in households due to its environmental friendliness, cost-effectiveness, convenience, and safety. It is a popular choice for cooking in many urban areas where PNG networks are available.