Here is the key thing to understand: LNG is not really a separate fuel with its own uses. Natural gas is liquefied purely so it can be stored and shipped efficiently. At its destination it is warmed back into ordinary gas and then does all the jobs natural gas has always done — generating power, heating buildings, driving industry, and feeding chemical plants. A smaller but growing set of uses takes advantage of LNG in its cold liquid form, principally as a transport fuel for ships and heavy trucks.
The short answer
Most LNG (after regasification) is burned to make electricity and heat. A growing slice is used directly, as a liquid, to fuel transport. The rest serves as a chemical feedstock and as backup or off-grid supply.
1. Generating electricity
Power generation is the single largest end-use of imported LNG worldwide. After regasification, the gas is burned in combined-cycle gas turbines (CCGTs), which capture exhaust heat to drive a second steam turbine and reach about 55-63% efficiency — among the highest of any thermal power technology.
For many countries, gas-fired power is the practical partner to renewables: gas turbines ramp up and down quickly to cover the gaps when wind and solar fall short. Switching a power system from coal to gas also cuts CO₂ per kilowatt-hour by roughly 40-50%, along with large reductions in local air pollution — the subject of our LNG vs. coal comparison.
2. Heating homes, water, and buildings
In cold and temperate climates, a large share of gas goes to space heating, water heating, and cooking. Households almost never see LNG directly — they receive regasified gas through the pipeline grid. But in import-dependent countries such as Japan, South Korea, and increasingly across Europe, much of that "pipeline" gas first arrived by ship as LNG.
LNG is also used for peak shaving: utilities store LNG and vaporise it on the coldest winter days, when heating demand spikes beyond what pipelines alone can supply.
3. Industry and chemical feedstock
Industry uses natural gas in two distinct ways:
- As process heat — high-temperature furnaces and kilns for steel, glass, cement, ceramics, and food processing run on gas.
- As a feedstock — gas is a raw material, not just a fuel. It is the primary input for ammonia (and therefore nitrogen fertiliser), methanol, and hydrogen, and it feeds petrochemical plants making the building blocks of plastics.
The fertiliser link matters globally: a large fraction of the world's food supply depends on nitrogen fertiliser made from natural gas, which is why gas-price shocks ripple through to food costs.
4. Marine fuel (LNG bunkering)
This is where LNG is used as a liquid, not regasified first. Since the International Maritime Organization tightened limits on sulphur in ship fuel, LNG has become an attractive marine fuel: it contains virtually no sulphur and cuts particulate and nitrogen-oxide emissions sharply versus heavy fuel oil. A growing fleet of LNG-powered container ships, tankers, and cruise vessels now refuels through a process called bunkering. The main climate caveat is unburned methane slip from some engine types.
5. Heavy road transport
For long-haul trucks, LNG's high energy density gives it an edge over compressed natural gas (CNG): a cryogenic tank holds far more energy than a high-pressure CNG cylinder of the same size, extending range between fill-ups. Passenger cars, by contrast, almost always use CNG rather than LNG, because the cryogenic handling is impractical at that scale. China in particular has built a substantial LNG-fuelled trucking fleet.
6. Off-grid and "virtual pipeline" supply
Where no pipeline reaches — remote towns, islands, mines, or factories — small volumes of LNG can be trucked or shipped in and regasified locally. This "virtual pipeline" delivers gas-fired power and heat to places a fixed pipeline could never economically serve, and provides emergency backup when pipeline supply is interrupted.
What LNG is not used for
A common misconception is that LNG is a special high-performance fuel burned in its liquid state in everyday equipment. In reality, almost all stationary uses burn the gas after it has been regasified — your boiler, stove, or local power plant runs on ordinary natural gas, regardless of whether it arrived by pipeline or as LNG. The liquid form exists to solve transport, not to change what the fuel does at the point of use.
Frequently asked questions
What is LNG used for?
LNG is liquefied only for storage and transport. Once regasified, it is used like any natural gas: generating electricity, heating buildings, fuelling industry, and as a chemical feedstock. In liquid form it also fuels ships and heavy trucks and supplies areas with no pipeline.
Is LNG used to generate electricity?
Yes — power generation is the largest single use of imported LNG. The regasified gas is burned in efficient combined-cycle gas turbines that emit far less CO₂ and air pollution per kilowatt-hour than coal.
Can you use LNG to fuel cars and trucks?
LNG suits long-haul heavy trucks and ships thanks to its high energy density, but passenger cars generally use CNG instead. LNG requires cryogenic tanks that are impractical for small vehicles.
Is LNG used for home heating?
Indirectly. Homes receive regasified gas through the pipeline grid; in import-dependent countries, much of that gas originally arrived as LNG.