Here are several interesting facts about natural gas. Natural gas is the cleanest-burning fossil fuel. Natural gas turbines produce energy with almost 90% efficiency, and with something called ‘cogeneration’ the ‘waste’ heat (after the turbine powers a generator) can be used for either heat, or, in combination with a pre-chiller, for refrigeration. Natural gas is more disaster-resistant than electrical. Most natural gas infrastructure on private or public property is in need of periodic leak checks and maintenance.