Gas depletion is a research area that focuses on the gradual reduction of natural gas reserves, which are non-renewable resources. It involves studying how much gas is being extracted and used compared to how much is being replenished through natural processes. Researchers in this field examine the various factors that contribute to gas depletion, such as increasing demand, inefficient extraction methods, and environmental concerns. They also explore potential solutions and alternatives to mitigate the impacts of gas depletion, such as developing renewable energy sources and improving energy efficiency.