The Unit of gas bill is:

🧠 Explanation:

The unit for a gas bill is the British Thermal Unit (BTU), measuring the energy content of natural gas used for heating or appliances. It quantifies heat energy, enabling accurate billing and consumption tracking. BTUs are standard in energy sectors, critical for household and industrial energy management. Understanding this unit is essential in environmental science and economics, ensuring efficient resource use and cost calculations. Its widespread use in utility billing highlights the importance of standardized energy measurements, supporting sustainable practices and informed decision-making in energy consumption across various sectors.