Methane is one of the most versatile energy sources on the planet. It makes up over 95% of the processed natural gas burned for energy and serves as a raw material for hydrogen, fertilizer, rocket fuel, and dozens of everyday products. Here’s how it’s actually used across industries and homes.
Electricity Generation
The single largest use of methane is generating electricity. In the United States, natural gas accounted for nearly 40% of electricity generation in 2022, surpassing coal as the top source. Power plants burn methane in gas turbines or combined-cycle systems that capture waste heat to squeeze more energy from the same fuel. Gas plants can also ramp up and down quickly, making them a common partner for wind and solar installations that need backup when the sun isn’t shining or the wind dies down.
Home Heating and Cooking
About 15% of all natural gas consumed in the U.S. goes to residential customers. Furnaces and boilers burn methane to heat homes, while gas water heaters, clothes dryers, and stoves round out its household presence. If your home has a gas connection, methane is doing work in multiple rooms. Commercial buildings, restaurants, and hotels use it in much the same way, particularly for space heating and large-scale cooking equipment.
Hydrogen Production
Most of the world’s industrial hydrogen comes from methane. In a process called steam methane reforming, methane reacts with high-temperature steam to produce hydrogen gas and carbon dioxide. A single-stage reformer converts roughly 67% of the methane fed into it. More advanced setups that add a second reforming stage push overall conversion to about 92%, making the process highly efficient. The hydrogen produced this way feeds into oil refining, metal processing, electronics manufacturing, and an expanding fuel cell market.
Fertilizer and Chemical Manufacturing
That same hydrogen is the essential ingredient in ammonia production. Ammonia is the backbone of nitrogen fertilizers, which support a large share of global food production. Without methane as the starting material, industrial-scale ammonia synthesis would be far more expensive and energy-intensive. Methane is also converted into methanol, a chemical building block used in plastics, paints, adhesives, and solvents. Together, ammonia and methanol represent two of the highest-volume chemicals derived from a single raw material.
Carbon Black for Tires and Plastics
Carbon black, the reinforcing filler in virtually every tire on the road, is produced by the thermal decomposition or controlled combustion of hydrocarbons, including natural gas. The process breaks methane apart under intense heat, leaving behind fine carbon particles that give rubber its strength, durability, and UV resistance. Beyond tires, carbon black shows up in inks, coatings, and plastic products where pigmentation or conductivity matters.
Vehicle Fuel
Methane powers cars, buses, and trucks in two forms: compressed natural gas (CNG) and liquefied natural gas (LNG). CNG vehicles produce about 390 grams of CO₂-equivalent emissions per mile on a full lifecycle basis, which is lower than conventional gasoline. CNG is most common in transit buses and fleet vehicles that return to a central station for refueling. LNG, which is methane cooled to a liquid state, is better suited for long-haul trucks and ships because it packs more energy into a smaller tank. Many cities run their public bus fleets on CNG specifically to reduce local air pollution.
Rocket Propellant
Liquid methane has become the propellant of choice for a new generation of rocket engines, including SpaceX’s Raptor. The reasons are practical: methane and liquid oxygen can be stored at similar temperatures, simplifying tank design. Methane is non-toxic, inexpensive, and relatively easy to handle compared to older propellants like hydrazine. Engine tests have shown combustion efficiencies above 97%, with expectations of exceeding 99% after hardware optimization. Methane also works well as a coolant for engine walls, and it could theoretically be manufactured on Mars from the carbon dioxide in its atmosphere, which is a major reason SpaceX chose it for interplanetary missions.
Renewable Methane From Waste
Methane doesn’t have to come from fossil sources. Landfills, sewage treatment plants, dairy farms, and food processors all generate biogas through anaerobic decomposition, where bacteria break down organic material in oxygen-free conditions. Raw biogas contains 45% to 65% methane. After cleaning and upgrading, it becomes renewable natural gas (RNG) with a methane content of 96% to 98%, making it fully interchangeable with fossil natural gas.
RNG can be injected directly into existing pipelines or compressed into CNG for vehicles. Many dairy farms capture methane from manure lagoons and use it to generate electricity on-site with diesel-engine generators. Paper mills, breweries, and food processors use anaerobic digesters both to treat waste and to produce fuel that offsets their energy costs. In the U.S., Clean Air Act regulations require larger landfills to install gas collection systems, and many of those facilities now generate electricity rather than simply flaring the gas off.
Environmental Tradeoffs
For all its usefulness, methane is a potent greenhouse gas. Over a 100-year period, it traps 27 to 30 times more heat than the same amount of CO₂. Over 20 years, that figure jumps to 81 to 83 times, because methane is extremely effective at trapping heat but breaks down faster than carbon dioxide. Burning methane produces CO₂, but the bigger concern is methane that leaks unburned from pipelines, valves, wells, and storage facilities. Reducing those leaks is one of the fastest ways to slow near-term warming, which is why methane monitoring and repair programs have become a major focus of climate policy worldwide.