Oil and natural gas touch nearly every part of modern life. Together they supply the majority of the world’s energy, powering transportation, heating homes, generating electricity, and serving as raw ingredients for thousands of everyday products. Here’s a closer look at where all that oil and gas actually goes.
How a Barrel of Oil Gets Divided Up
Crude oil isn’t useful on its own. Refineries heat it and separate it into different products based on weight. According to U.S. Energy Information Administration data for 2024, the breakdown of a typical barrel looks like this:
- Gasoline: 46% of refinery output, fueling cars and light trucks
- Diesel and heating oil: about 30%, used in freight trucks, buses, farm equipment, ships, and home heating
- Jet fuel: 11%, powering commercial and military aircraft
- Petrochemical feedstocks and other products: the remaining share, which becomes plastics, chemicals, lubricants, asphalt, and waxes
The takeaway is that the vast majority of every barrel goes straight into fuel tanks. Only a small fraction becomes the raw material for manufacturing, but that small fraction produces an enormous range of goods.
Transportation: The Biggest Consumer of Oil
About 60% of the world’s oil is consumed by the transportation sector. Road vehicles alone account for roughly 80% of all transport energy. That includes personal cars, delivery vans, long-haul trucks, and buses. Aviation takes the next largest slice at 11% of refinery output, and maritime shipping relies heavily on heavier fuel oils refined from the bottom of the barrel.
This dependence on oil is why gasoline and diesel prices ripple through the entire economy. When fuel costs rise, so does the price of almost everything that gets moved by truck, ship, or plane.
Electricity Generation From Natural Gas
Natural gas is the world’s second-largest source of electricity. Gas-fired power plants represent more than 20% of global electricity generation. In many countries, that share is even higher because gas plants can ramp up and down quickly, making them useful partners for wind and solar farms that produce power intermittently.
Gas turbines burn cleaner than coal, producing roughly half the carbon dioxide per unit of electricity. That’s one reason utilities have been switching from coal to gas over the past two decades, though it’s still a fossil fuel with significant emissions.
Heating, Cooking, and Everyday Home Use
About 60% of U.S. homes use natural gas for space heating, water heating, cooking, or clothes drying. Nationally, the residential sector accounts for around 14% of total U.S. natural gas consumption. In colder climates, gas furnaces and boilers are the dominant heating source because gas is relatively affordable and delivers heat quickly.
Natural gas also flows into commercial buildings for the same purposes: restaurants, hotels, hospitals, and office buildings all rely on it for climate control and hot water.
Heavy Industry and Extreme Heat
Many industrial processes need temperatures that are difficult or impossible to achieve with electricity alone. Natural gas is the go-to fuel for these applications. Burning it can reach the extreme temperatures required to manufacture steel, cement, glass, ceramics, and certain chemicals. Around half of the total heat demand in energy-intensive industries requires temperatures above 500°C, and some processes push far higher. Glass melting, for example, requires temperatures between 600°C and 1,600°C. Carbon fiber production can demand heat as high as 2,800°C.
Beyond generating heat, natural gas fuels industrial furnaces used for metal smelting, kilns for bricks and cement, and combined heat and power systems that simultaneously produce electricity and useful steam for factories. Food processing, product drying, and metal preheating all depend on it as well.
Fertilizer and Global Food Supply
One of the less obvious but most consequential uses of natural gas is making fertilizer. Most of the world’s ammonia, the key ingredient in nitrogen fertilizers, is manufactured by processing natural gas through a series of chemical steps that isolate hydrogen, which then reacts with nitrogen from the air. Over 80% of global ammonia production goes directly into fertilizers like urea.
This connection means natural gas prices have a direct effect on food prices worldwide. When gas gets expensive, fertilizer costs spike, and farmers either pay more or use less, which can reduce crop yields. Billions of people depend on food grown with these fertilizers, making natural gas a quiet but critical link in the global food chain.
Plastics, Clothing, and Thousands of Consumer Products
A small but incredibly versatile fraction of every barrel of oil becomes the building blocks for petrochemicals. These chemicals are then transformed into plastics, synthetic fibers, and a long list of materials you encounter daily. The U.S. Department of Energy catalogs dozens of product categories derived from oil and natural gas, including plastics, synthetic rubber, nylon, polyester clothing, detergent, shampoo, adhesives, insulation, vinyl flooring, packaging, and tires.
Think about what you’ve touched today: your toothbrush, phone case, shoes, the trash bag in your kitchen, the upholstery on your couch. Most of these contain petroleum-derived materials. Even items that don’t seem related to oil, like permanent-press shirts, dyes, and shoe polish, rely on petrochemical ingredients during manufacturing.
Sports car bodies, parachutes, safety glasses, and medical tubing all come from the same origin. The sheer variety is one reason oil remains so difficult to replace even as the energy sector shifts toward renewables. You can swap a gas power plant for a wind farm, but replacing the raw material in thousands of manufactured goods is a different challenge entirely.
Where Demand Is Headed
Global oil demand continues to grow, though at a slowing pace. The IEA projects demand will rise by about 850,000 barrels per day in 2026, a modest increase compared to historical growth rates. Economic uncertainty and higher prices are tempering consumption, while electric vehicles are beginning to chip away at gasoline demand in some markets.
Natural gas demand remains strong, driven by electricity generation in developing economies and continued industrial use. Even as renewable energy capacity expands rapidly, gas is filling the gap left by coal retirements in many countries, keeping its share of the energy mix relatively stable for now.