Animation: How Wind Turbines Work
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Animation: How Wind Turbines Work



The windmill, which converts wind into rotational energy to mill grain or pump water, has been around since antiquity. It’s even been claimed that Ancient Babylonians planned to harness wind as early as almost 4,000 years ago, as part of a scheme for one of Hammurabi’s ambitious irrigation projects.

By the end of the 19th century, wind energy took on a whole new meaning as engineers in Scotland, Denmark, and the United States invented the first wind turbines that generated electricity. Many technological improvements have been made since, and now modern wind farms dot the landscapes of countries around the world.

Related Topic: What it Would Take to Power New York City

Today, wind power is an important element of the green energy mix, and its estimated that 432 GW of wind farms are installed globally. In the United States, nearly 5% of all power is now generated by wind.

How Wind Turbines Work

How Wind Turbines Work

How do these massive propellers get into motion? Once they are turning, what do they do?

As shown in the animation, it’s all about the lift and drag forces created by the shape of the blades. Lift acts perpendicular to the direction of wind flow and drag acts parallel to the direction of wind flow.

How Wind Turbines Work

The blades are designed so that when wind passes, a low-pressure pocket of air is created by faster moving wind on the curved side of the blade. This sucks the blade in the downwind direction, creating lift. The blades are then connected to a series of shafts that spin an electromagnetic induction generator, and this creates electricity.

There are some other bells and whistles that help to maximize efficiency in a modern wind turbine as well.

The anemometer measures wind speed, while the controller starts and stops the turbines to operate only at desirable wind speeds (between 8 and 55 kmph). The wind vane measures the wind’s direction and communicates this information to the yaw drive, which helps make adjustments to the turbine’s orientation. Lastly, there is also a braking system installed which can be used for emergency stops when wind speeds get too extreme.

Original graphic by: SaveOnEnergy

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Visualizing the Scale of Global Fossil Fuel Production

How much oil, coal, and natural gas do we extract each year? See the scale of annual fossil fuel production in perspective.



The Scale of Global Fossil Fuel Production

This was originally posted on Elements. Sign up to the free mailing list to get beautiful visualizations on natural resource megatrends in your email every week.

Fossil fuels have been our predominant source of energy for over a century, and the world still extracts and consumes a colossal amount of coal, oil, and gas every year.

This infographic visualizes the volume of global fossil fuel production in 2021 using data from BP’s Statistical Review of World Energy.

The Facts on Fossil Fuels

In 2021, the world produced around 8 billion tonnes of coal, 4 billion tonnes of oil, and over 4 trillion cubic meters of natural gas.

Most of the coal is used to generate electricity for our homes and offices and has a key role in steel production. Similarly, natural gas is a large source of electricity and heat for industries and buildings. Oil is primarily used by the transportation sector, in addition to petrochemical manufacturing, heating, and other end uses.

Here’s a full breakdown of coal, oil, and gas production by country in 2021.

Coal Production

If all the coal produced in 2021 were arranged in a cube, it would measure 2,141 meters (2.1km) on each side—more than 2.5 times the height of the world’s tallest building.

China produced 50% or more than four billion tonnes of the world’s coal in 2021. It’s also the largest consumer of coal, accounting for 54% of coal consumption in 2021.

Rank Country2021 Coal Production
(million tonnes)
% of Total
#1🇨🇳 China 4,126.050%
#2🇮🇳 India 811.310%
#3🇮🇩 Indonesia 614.08%
#4🇺🇸 U.S. 524.46%
#5🇦🇺 Australia 478.66%
#6🇷🇺 Russia 433.75%
#7🇿🇦 South Africa 234.53%
#8🇩🇪 Germany 126.02%
#9🇰🇿 Kazakhstan 115.71%
#10🇵🇱 Poland 107.61%
🌍 Other 600.97%

India is both the second largest producer and consumer of coal. Meanwhile, Indonesia is the world’s largest coal exporter, followed by Australia.

In the West, U.S. coal production was down 47% as compared to 2011 levels, and the descent is likely to continue with the clean energy transition.

Oil Production

In 2021, the United States, Russia, and Saudi Arabia were the three largest crude oil producers, respectively.

Rank Country2021 Oil Production
(million tonnes)
% of Total
#1🇺🇸 U.S. 711.117%
#2🇷🇺 Russia 536.413%
#3🇸🇦 Saudi Arabia 515.012%
#4🇨🇦 Canada 267.16%
#5🇮🇶 Iraq 200.85%
#6🇨🇳 China 198.95%
#7🇮🇷 Iran 167.74%
#8🇦🇪 UAE 164.44%
#9 🇧🇷 Brazil156.84%
#10🇰🇼 Kuwait 131.13%
🌍 Other 1172.028%

OPEC countries, including Saudi Arabia, made up the largest share of production at 35% or 1.5 billion tonnes of oil.

U.S. oil production has seen significant growth since 2010. In 2021, the U.S. extracted 711 million tonnes of oil, more than double the 333 million tonnes produced in 2010.

Natural Gas Production

The world produced 4,036 billion cubic meters of natural gas in 2021. The above graphic converts that into an equivalent of seven billion cubic meters of liquefied natural gas (LNG) to visualize it on the same scale as oil and gas.

Here are the top 10 producers of natural gas in 2021:

Rank Country2021 Natural Gas Production
(billion m3)
% of Total
#1🇺🇸 U.S. 934.223%
#2🇷🇺 Russia 701.717%
#3🇮🇷 Iran 256.76%
#4🇨🇳 China 209.25%
#5🇶🇦 Qatar 177.04%
#6🇨🇦 Canada 172.34%
#7🇦🇺 Australia 147.24%
#8🇸🇦 Saudi Arabia 117.33%
#9🇳🇴 Norway 114.33%
#10🇩🇿 Algeria 100.82%
🌍 Other 1106.327%

The U.S. was the largest producer, with Texas and Pennsylvania accounting for 47% of its gas production. The U.S. electric power and industrial sectors account for around one-third of domestic natural gas consumption.

Russia, the next-largest producer, was the biggest exporter of gas in 2021. It exported an estimated 210 billion cubic meters of natural gas via pipelines to Europe and China. Around 80% of Russian natural gas comes from operations in the Arctic region.

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