Since 1776, the United States has used a variety of energy sources, allowing us to analyze its evolution as a reflection of global changes in energy consumption. The country has gone from using wood as its main source of energy to relying on coal, oil and natural gas, the most widely used fossil fuels in recent world history.
In several charts from the Energy Information Administration (EIA), we can clearly see the historical changes in energy sources and how they are distributed. As we move forward in time, it is clear how fossil fuels dominated the US energy mix for more than a century. Despite the rise of renewable energy, fossil fuels still retain a significant share of the country's energy mix.
The dominance of fossil fuels
From the end of the 1900th century, coal began to gain ground as the main source of energy, displacing wood. Its rise was such that by XNUMX coal supplied most of the country's factories and locomotives. By the mid-XNUMXth century, coal was overtaken by oil in energy consumption, the latter becoming the most widely used fuel, especially in the transport sector.
Natural gas also gained ground in the national energy mix during the second half of the 20th century, becoming a key source for electricity generation and further displacing coal. Despite events in the 1970s that momentarily disrupted fossil fuel consumption, its dominance was not challenged until the arrival of renewable energy decades later.
The United States' heavy reliance on these three fossil fuels (oil, natural gas and coal) has lasted for more than a century, accounting for up to 80% of the country's total energy consumption. Although there has been a strong push toward renewable energy in recent years, fossil fuels are not expected to disappear from the scene immediately.
Energy Beginnings: Wood
In the late 18th and early 19th centuries, wood played a prominent role as the primary source of energy in American homes. This resource was abundant and renewable, providing heating and cooking energy. For many years it was the backbone of the domestic economy until the arrival of coal revolutionized the industry.
The use of wood began to decline towards the middle of the 19th century, when coal became the dominant energy source to drive the industrial boom. The transition from wood to coal had serious implications for the socioeconomic development of the United States, facilitating the expansion of factories and rail transport, key sectors for consolidating the country's growth.
The nuclear age and the transition
The second half of the 50th century saw the emergence of a new form of energy: nuclear power. Since its first commercial plant in the XNUMXs, nuclear power was seen as a reliable and clean alternative to fossil fuels. However, despite its potential, its growth was slow and its integration into the energy mix stagnated due to problems such as accidents and safety concerns.
However, nuclear plants continue to operate, generating nearly 19% of total U.S. electricity today. Unlike other countries that have decreased their reliance on nuclear power, such as Japan after the Fukushima disaster, the United States still views nuclear power as a key pillar in its transition to cleaner energy.
Renewable energy: a necessary change
Renewable energy, including hydro, wind, solar and biomass, experienced a resurgence in the 80s and is emerging as the foundation of America's energy future. While growth was slow in the early decades, the country has seen significant advances since the first decade of the XNUMXst century, especially in solar and wind power.
By 2014, renewables accounted for 10% of the country’s total energy consumption, and this percentage has been increasing with each passing year. In 2022, for example, wind power surpassed hydropower as the most widely used renewable source. This shift is due in part to remarkable technological advances that have made this energy more accessible and competitive compared to fossil fuels.
Today, approximately 17% of electricity generated in the United States comes from renewable sources. While the figure may seem modest compared to other nations, such as Denmark, which generates more than 50% of its electricity through renewable energy, the trend is still upward in the United States.
America's energy future
As we look ahead to the next few decades, the U.S. energy landscape faces both challenges and opportunities. Reducing dependence on fossil fuels is key not only to sustainability, but also to meeting international commitments under agreements like the Paris Agreement aimed at reducing greenhouse gas emissions.
Natural gas and oil are expected to remain dominant in the near term, but renewables such as wind, solar and biomass are expected to continue their accelerated growth. In particular, solar is seeing an exponential increase in the number of installations and generation capacity, thanks in part to more favorable tax incentives and regulatory frameworks.
America's future will depend on its ability to integrate cleaner, more sustainable sources into its energy mix. Following in the footsteps of other nations such as France and Germany, which have made significant progress in the transition to low-carbon energy, the United States is seeking to balance its dependence on fossil fuels with the environmental and economic needs of the 21st century.
With a well-thought-out strategy and a greater push for research and development, the United States can lead the green energy revolution in the years ahead, setting an example for the rest of the world and ensuring a more sustainable future for generations to come.