In addition, unlike the oil, coal and nuclear processes, the natural gas process produces virtually no solid waste and has much less impact on water quality. The natural gas system is extremely efficient as are most types of appliances and equiptment that operate on natural gas .
Energy efficiency refers to the energy input per unit of useful energy output.
In other words, energy efficiency measures how much energy is used or lost in providing such things as hot water, steam, warm or cool air. The higher the energy efficiency, the greater the conservation of energy and the lower the environmental impacts. Moreover, gas appliances and equipment are extremely efficient as evidenced by the fact that the residential use of gas per customer is about 16 percent less today than it was in 1980. Natural gas is the most economical energy choice . Natural gas is usually the most economical form of energy available regardless of which competing fuel it is measured against, the application involved or the geographical location of the consumer.