Coal's Importance to the World
Modern life is unimaginable without electricity. It lights houses, buildings, and streets; provides domestic and industrial heat; and powers most equipment and machinery used in homes, offices and factories.
Coal is the most abundant source of electricity worldwide, currently providing more than 36% of global electricity. Coal-fueled power plants account for nearly one-quarter of the electricity in the United States.
In the U.S., coal is a “home grown” energy source. U.S. mines account for virtually all of the coal used to provide electricity domestically. By contrast, other important energy sources, including nuclear and renewable energy, are heavily reliant on imported minerals to fuel nuclear reactors or construct wind turbines and solar panels.1 Those technologies, however, produce zero emissions. As a result, electricity generation from coal has declined in favor of those and other sources.
Coal-fired power plants provide affordable, reliable and constant power that is available on demand to meet energy consumption needs. As much of the world lacks access to modern, clean energy, coal is still essential to alleviating worldwide energy poverty. The challenge the industry faces lies in developing technologies and pathways to zero emissions, especially carbon dioxide, which scientists identify as a factor in climate change.
Coal also serves many industrial uses. Among the most significant are steel production, which uses metallurgical/coking coal, and cement manufacture.2 Coal and coal by-products are also used to manufacture a variety of goods, including activated carbon used in filters for water and air purification systems; carbon fiber in the construction of airplanes and automobiles; silicon metal for lubricants and even chemical processes to extract rare earth elements, just to name a few examples.
Background – Coal – What It is, Where It’s Found and Why that’s Important
Coal, What It is – Coal is a combustible organic rock, composed mainly of carbon, hydrogen and oxygen. It is formed from vegetation, which has been consolidated between other rock strata and altered by the combined effects of pressure and heat over millions of years to form coal seams.3 There are four major types (or “ranks”) of coal: Anthracite, Bituminous, Subbituminous and Lignite.4.
Where It’s Found – The simple answer: Almost Everywhere. As the figure below demonstrates, coal exists in significant quantities throughout the world, and is far more plentiful than oil or gas, with coal reserves worldwide in 2018 accounting for 132 years of production.5
Why that’s Important – Due to its abundance and proximity to markets, coal remains the second-largest primary energy source in the world (by consumption), and the U.S. holds the world’s richest coal reserve base, more than 260 billion tons.6 See figure below.
Coal and Electricity Generation Worldwide
In 2019, coal comprised 27% of the world’s primary energy consumption and 36.4% of the all electricity generated in the world.7 See figure below.
Alleviating Energy Poverty – Coal Is Part of the Solution
Coal is key to alleviating energy poverty. Approximately 860 million people across the globe currently live without access to electricity. Nearly 2.6 billion people do not have clean cooking facilities. The problem is spread across the developing world, but it is particularly severe in sub-Saharan Africa and developing Asia, which together account for 95% of people in energy poverty. Without a commitment to achieve universal energy access, it has been estimated that by 2030 there will be an additional 1.5 million premature deaths per year caused by household pollution from burning wood and dung and through a lack of basic sanitation and healthcare.9
Life expectancy, educational attainment and income all correlate with per capita electricity use, and more of the world’s electricity is fueled by coal than any other source.10 Notably, between 1990 and 2010, about 1.7 billion people gained access to electricity, thanks in large part to coal. 11 For these reasons, coal use in some countries, especially in the developing world, is increasing, and other forms of energy are not readily available.
Coal Use in the United States
In the United States, coal is by far the nation’s most abundant energy source, constituting nearly 90% of all fossil fuel reserves. 12 Because of its abundance, reliability and affordability, about 23.4% of the nation’s electricity is generated from coal, resulting in electricity costs that generally are 30% lower in states that rely upon coal for more than half of their electricity generation versus states that rely on other fuels.13 See figure below.
ECONOMIC CONTRIBUTIONS – U.S. Economy
As the National Mining Association reports, the coal industry is a vital source of jobs that create positive ripple effects throughout society and our economy. These include the direct employment of nearly 150,000 people and the creation of 3.3 jobs for every job in coal mining, for a total of more than 500,000 jobs. Coal mines are an especially important source of employment in rural economies throughout America. Coal generated $26 billion in sales and paid $13 billion in direct wages and salaries according to a 2017 analysis by the National Mining Association.
CLIMATE CHANGE AND THE PATHWAY TO ZERO EMISSIONS
Notwithstanding coal’s economic contributions, its abundance, reliability and affordability, coal use in the United States has declined due in part to concerns about the impact of carbon dioxide and other emissions on climate. Although emissions of pollutants other than carbon dioxide from coal generation have declined substantially since the 1970s, coal use in the U.S. is expected to continue to decline from current levels to less than 15% of total electricity generation by mid-century, according to the Energy Information Administration.15 This is due to largely to increased regulation, competition from and mandates for less carbon intensive sources.
The U.S. cannot solve the challenge of climate change on its own, and coal is not the only contributor of CO2 emissions, as the figure below demonstrates. In fact, coal is no longer the largest source of carbon dioxide emissions in the United States, and the U.S. only accounts for 15% of total worldwide emissions.
As the world will continue to rely upon coal and other fossil fuels to meet critical energy needs, a technologically based approach to reducing CO2 emissions through an “all of the above” energy strategy and path to zero emissions is arguably the most enlightened solution. As the World Coal Association (WCA) further points out, low emissions technologies exist which make significant reductions in CO2 emissions from coal use. High efficiency, low emissions (HELE) coal technologies, together with carbon capture and sequestration or storage (CCS), are critical to meeting energy needs and climate goals. According to WCA, “Moving the current average global efficiency rate of coal-fired power plants from 37.5% to 47.5% by deploying more advanced technology could cut 2 gigatons of CO2 emissions while allowing affordable energy for economic development and poverty reduction. Deploying HELE coal-fired power plants is also a key first step along a pathway to near-zero emissions from coal with CCS.”16 The challenge lies in making these cutting edge technologies commercially viable.
STEEL, CEMENT AND OTHER INDUSTRIAL USES OF COAL
The industry’s future will also hinge on diversifying the use of coal beyond electricity generation, given the already substantial industrial uses that currently exist, and new alternative uses in development stage as outlined below.
Coke for Steel – As the WCA reports, manufacturing steel delivers the goods and services that our societies need – healthcare, telecommunications, improved agricultural practices, better transportation networks, clean water and access to reliable and affordable energy. Steel is an alloy based primarily on iron. As iron is bonded with other elements in the earth’s crust, the ores must be converted, or ‘reduced’, using carbon. The primary source of this carbon is coking coal.17
Cement – Coal provides around 90% of the energy consumed by cement plants around the world. It takes 200 – 450kg of coal to produce 1 ton of cement. The cement industry consumes around 4% of global coal production, around 330Mt/yr.18 Cement is an important commodity for building wind turbines.
Other Important Industrial Uses of Coal – The WCA also reports that “other important users of coal include alumina refineries, paper manufacturers, and the chemical and pharmaceutical industries. Several chemical products can be produced from the by-products of coal. Refined coal tar is used in the manufacture of chemicals, such as creosote oil, naphthalene, phenol, and benzene. Ammonia gas recovered from coke ovens is used to manufacture ammonia salts, nitric acid and agricultural fertilizers. Thousands of different products have coal or coal by-products as components: soap, aspirins, solvents, dyes, plastics and fibers, such as rayon and nylon.”19 ”20 Some of these products are needed for clean water purification as well as nonrenewable energy technologies.
These products also come from coal – Coal is an essential ingredient in the following products we use in our daily lives or that are essential to public health:
- Activated carbon – used in filters for water and air purification and in kidney dialysis machines.
- Carbon fiber – an extremely strong but light-weight reinforcement material used in construction, airplane and automobile manufacture, even mountain bikes and tennis rackets.
- Carbon foam – designed to meet growing demand for ultra-high performance engineering materials in the military, industrial, aerospace and commercial product markets.21
- Silicon metal – used to make lubricants, water repellents, resins, cosmetics, hair shampoos and toothpastes. Silicon is one of the most useful elements to humanity. Silicon alloys are used to make dynamo and transformer plates, engine blocks, cylinder heads and machine tools. 22
Coals Role in Renewable Energy – Research and development stage technologies are also successfully extracting rare earth elements from coal and coal refuse. These rare earth minerals – on which the United States is almost wholly import-dependent – are essential to the military and aerospace industries, as well in renewable energy.