a. reserves in the United States may last many decades, even with increased demand.
Explanation:
The demand for natural gas has increased in the USA and the good news about it is that the country has a large stock that can last for many years. One of the main reasons for the demand for the use of natural gas is its simplicity in extraction, no refinement and less polluting nature since its burning does not release soot into the atmosphere and releases less carbon dioxide.
