No. Natural gas is not a renewable energy source. It is a fossil fuel that formed over millions to hundreds of millions of years, and the supply in the ground is finite. The one exception is renewable natural gas (RNG) made from landfill and farm waste, which the EIA put at nearly 0.2% of total US natural gas consumption in 2022. The other 99.8% is fossil gas.
This guide explains why natural gas is classed as nonrenewable, how its emissions compare with coal, gasoline, and diesel, what methane leaks change, and where RNG fits. It also gives short answers on geothermal, hydro, biomass, solar, nuclear, and coal.
Is natural gas renewable or nonrenewable?
Natural gas is nonrenewable. The US Energy Information Administration (EIA) lists it with petroleum, hydrocarbon gas liquids, coal, and nuclear energy as a nonrenewable source, and describes it as “a fossil fuel energy source.”
It is also the largest source of US electricity. In 2025, natural gas produced about 41% of the roughly 4,429 billion kWh of US utility-scale generation, ahead of renewables at 24%, nuclear at 18%, and coal at 17% (EIA, preliminary 2025 data). Gas also supplied about 36% of total US primary energy in 2023, when the country burned 32.50 trillion cubic feet (Tcf) of it (EIA).
Why is natural gas non renewable?
The answer comes down to timescales. A resource is renewable when nature replaces it about as fast as we use it. Natural gas does not come close.
How natural gas forms
According to the EIA, natural gas formed “millions to hundreds of millions of years ago.” The remains of plants and animals, including tiny marine organisms called diatoms, built up in thick layers and were buried under sand, silt, and rock. Heat and pressure slowly turned that material into coal, oil, and gas. The main component of natural gas is methane (CH₄).
How much is left
US proved reserves of natural gas were about 604 Tcf of wet gas at the end of 2023, down 13% from the 2022 record of 691 Tcf (EIA).
The broader measure is technically recoverable resources: about 2,973 Tcf of dry natural gas as of January 1, 2021, which the EIA calculated would last about 86 years at the 2021 production rate of 34.52 Tcf per year (2,973 ÷ 34.52 = 86). That is a large supply, but it is a countdown, not a cycle.
Is natural gas a fossil fuel?
Yes. Natural gas is one of the three main fossil fuels, with coal and petroleum. All three come from ancient organic matter, are finite, and release carbon dioxide when burned.
“Natural” only means the gas occurs underground and was not manufactured. It says nothing about whether the fuel is renewable or low carbon.
How much CO₂ comes from your gas and electricity? Enter a few figures from your bills and get your footprint split by source. Open the free Carbon Calculator
Is natural gas clean energy?
Natural gas is the cleanest-burning fossil fuel, but it is not clean energy in the way wind or solar are. It emits less CO₂ per unit of heat than coal or oil, and still a lot.
The table below uses the EIA’s carbon dioxide emissions coefficients (released September 2024). For background, see our guide to emission factors.
| Fuel | Pounds CO₂ per million Btu | Kilograms CO₂ per million Btu | Compared with natural gas |
|---|---|---|---|
| Natural gas | 116.65 | 52.91 | Baseline |
| Gasoline | 155.77 | 70.66 | 34% more |
| Diesel and heating oil | 163.45 | 74.14 | 40% more |
| Coal, bituminous | 205.57 | 93.24 | 76% more |
| Coal, subbituminous | 214.13 | 97.13 | 84% more |
| Coal, lignite | 216.64 | 98.27 | 86% more |
| Coal, anthracite | 228.60 | 103.69 | 96% more |
The last column is our arithmetic. For bituminous coal: 205.57 ÷ 116.65 = 1.76, or 76% more CO₂ than gas for the same heat.
Worked example: a home that uses 500 therms a year
The EPA’s factor for natural gas is 0.0053 metric tons of CO₂ per therm. For a home that burns 500 therms a year:
- 500 therms × 0.0053 metric tons = 2.65 metric tons of CO₂ per year
- 2.65 metric tons × 2,204.6 = about 5,842 pounds of CO₂
- Cross-check with the EIA factor: 500 therms = 50 million Btu, and 50 × 52.91 kg = 2,645.5 kg, or 2.65 metric tons
The EPA puts average US household gas use at 39,319 cubic feet, or about 2.16 metric tons of CO₂ a year (2022 data). For the electric side of the bill, read how many kWh a house uses.
Natural gas vs coal emissions
In power plants the gap is wider than the fuel table suggests, because gas plants convert heat to electricity more efficiently. The EIA’s figures for 2023:
| Source (2023, EIA) | Generation (billion kWh) | Pounds CO₂ per kWh | Grams CO₂ per kWh |
|---|---|---|---|
| Natural gas | 1,806 | 0.96 | 435 |
| Coal | 675 | 2.31 | 1,048 |
| US average, all sources | 4,183 | 0.81 | 367 |
Grams are converted from the EIA’s pounds at 453.6 grams per pound. A kilowatt-hour from gas produced 0.96 ÷ 2.31 = 42% of the CO₂ of a kilowatt-hour from coal, which is 58% less at the smokestack.
Gas is still above the national average, since nuclear, wind, hydro, and solar emit no CO₂ when generating. You can apply these factors to your own usage with the kWh to CO₂ calculator, or see how the grid differs across the country in our CO₂ emissions by state data.
Methane leaks: the part the smokestack numbers miss
The tables above count only CO₂ from burning gas. Some gas, which is mostly methane, escapes unburned from wells, processing plants, and pipelines.
Methane is a far stronger greenhouse gas than CO₂ while it lasts. The IPCC’s Sixth Assessment Report gives fossil methane a global warming potential of 29.8 over 100 years and 82.5 over 20 years. One ton of leaked methane counts as 29.8 tons of CO₂ equivalent on the 100-year basis. Our guide to what CO₂e means covers how that conversion works.
How much leaks?
Estimates differ depending on the method:
- EPA Greenhouse Gas Inventory: 8.1 million metric tons of methane from the US oil and gas supply chain in 2015, a leak rate of about 1.4% of gross gas production (as reported in Alvarez et al.).
- Alvarez et al., Science, 2018: 13 million metric tons (plus or minus 2) for the same year, or 2.3% of gross production, based on facility-level measurements. That is 13 ÷ 8.1 = 1.6, about 60% higher than the inventory.
The same study found that leakage at 2.3% produces warming over a 20-year horizon “comparable to the CO₂ from natural gas combustion.” Over 100 years the leak penalty is smaller, because methane breaks down in the atmosphere in about 12 years.
Is natural gas better than coal?
On CO₂ at the power plant, yes: 58% less per kWh in 2023. Once methane leaks are counted the lead narrows. This is the core of the “bridge fuel” debate.
The case for gas as a bridge fuel
The International Energy Agency’s 2019 report The Role of Gas in Today’s Energy Transitions estimated that coal-to-gas switching had saved around 500 million metric tons of CO₂ since 2010. On a life-cycle basis, including methane, it found switching cuts emissions by about 50% for electricity and 33% for heat.
The case against
The same IEA report states that switching between unabated fossil fuels “does not provide a long-term answer to climate change.” The IEA’s 2021 Net Zero by 2050 pathway includes no new oil and gas fields approved for development beyond those already committed, and has gas demand falling 55% by 2050.
Critics also point to the measurement gap above. If real leak rates are well above official inventories, the short-term climate advantage over coal shrinks. The alternatives are also getting cheaper to build: see how much electricity a wind turbine produces.
Renewable natural gas (RNG): the exception
Renewable natural gas, also called biomethane, is the one form of pipeline gas that qualifies as renewable. The EPA defines it as biogas that has been upgraded for use in place of fossil natural gas.
Biogas comes from organic matter breaking down without oxygen at landfills, livestock farms, and wastewater plants. Raw biogas is 45% to 65% methane and is cleaned up to 90% or more (EPA). It is the same methane as fossil gas, so it burns and leaks the same way.
How much renewable natural gas exists?
Very little compared with fossil gas. EPA’s Landfill Methane Outreach Program counted 102 landfill RNG projects and 135 agricultural RNG projects operating in 2023, up from 70 and 53 in 2020.
On volume, the EIA reported that RNG qualifying under the Renewable Fuel Standard totaled 55 billion cubic feet in 2022, “nearly 0.2% of total natural gas consumption.” A quick check against 2023 consumption gives the same scale: 55 ÷ 32,500 billion cubic feet = 0.17%.
What is the difference between renewable and non renewable energy?
The EIA’s definition is short: renewable sources “are constantly replenished by nature.” Nonrenewable sources are limited to what can be extracted from the earth.
Examples of renewable and non renewable energy
| Energy source | Renewable? | Why (EIA classification) |
|---|---|---|
| Solar | Yes | Sunlight arrives continuously |
| Wind | Yes | Driven by the sun heating the atmosphere |
| Hydropower | Yes | Rivers are refilled by the water cycle |
| Geothermal | Yes | Heat flows continuously from inside the earth |
| Biomass | Yes | Plants and organic waste regrow within years, if harvested no faster than they regrow |
| Renewable natural gas | Yes | Made from current organic waste, a form of biomass energy |
| Natural gas | No | Fossil fuel formed over millions of years |
| Coal | No | Fossil fuel formed over millions of years |
| Petroleum | No | Fossil fuel formed over millions of years |
| Nuclear | No | Uranium is a mined, finite mineral, though nuclear plants emit no CO₂ when generating |
Renewable and low carbon are not the same thing: nuclear is nonrenewable but carbon-free at the plant, and biomass is renewable but releases CO₂ when burned.
Frequently asked questions
Is geothermal renewable energy?
Yes. The EIA lists geothermal among the five major renewable sources, because heat is produced continuously inside the earth.
Is biomass a renewable energy?
Yes. Wood, crops, and organic waste regrow within years, so the EIA classes biomass as renewable.
Is hydro a renewable energy?
Yes. Hydropower relies on rain and snow refilling rivers and reservoirs. It generated about 6% of US utility-scale electricity in 2025 (EIA).
Is coal renewable energy?
No. Coal is a fossil fuel and the most carbon-intensive one, at 205.57 to 228.60 pounds of CO₂ per million Btu depending on type (EIA).
Is nuclear energy renewable?
No. The EIA classifies nuclear as nonrenewable because uranium is a finite mined resource. It emits no CO₂ during generation, so it is often called clean but not renewable.
Sources
- EIA: Carbon Dioxide Emissions Coefficients (September 2024)
- EIA FAQ: How much CO₂ is produced per kilowatthour of US electricity generation?
- EIA: Electricity generation, capacity, and sales in the United States
- EIA FAQ: How much natural gas does the United States have, and how long will it last?
- EIA: Renewable Fuel Standard volume targets and renewable natural gas production
- EPA Landfill Methane Outreach Program: Renewable Natural Gas
- Alvarez et al. (2018), Assessment of methane emissions from the US oil and gas supply chain, Science
About the author
Georgi Todorov is an eco activist and entrepreneur. He runs Ecoki, where he builds free tools and guides that help small businesses measure and cut their carbon footprint.