B2 – Upper Intermediate
The construction of the Three Gorges Dam in China has brought significant attention to the effects of large-scale engineering projects on the Earth’s natural systems. One of the remarkable findings associated with this dam is its potential impact on the Earth’s rotation. Although the idea may seem far-fetched at first, scientific studies indicate that massive reservoirs can influence the global distribution of mass and, consequently, the rotation speed of the Earth.
In conclusion, these dams serve as an example of how human actions can have broader environmental effects than previously anticipated. While the immediate goal of the dam was to generate electricity and control flooding, the dam also illustrates the complex relationship between human engineering and the Earth’s systems. As we move forward, it is essential to consider these interactions when planning and executing large-scale projects. Understanding these dynamics can help in making better decisions that align with environmental sustainability and Earth’s natural rhythms.
Watch the video to learn more about how the Three Gorges Dam slows the Earth’s rotation.
Vocabulary Questions:
- What is a “reservoir”? “When the dam slows or stops the flow of water to fill up its reservoir, it holds 10 trillion gallons of water which weigh a total of 83.4 trillion pounds.” Use it in a sentence.
- What does “to put something in perspective” mean? “To put it in perspective, this dam could power the entirety of New Zealand and Ireland and Iceland and Costa Rica and the Bahamas and Rwanda combined.” Use it in a sentence. Give a similar expression.
- What does “miniscule” mean? “Every single movement of mass up or down, in fact, has some miniscule effect on how fast Earth rotates.” Use it in a sentence. Give a synonym.
Discussion Questions:
- How does a dam slow down the Earth’s rotation?
- What is your reaction to this?
- Do you think it’s a problem if human activities can slightly change how the Earth spins? Why?
- Should countries consider global effects when planning large infrastructure projects? Why?
- The report states that there are many reasons for the slowing of Earth’s rotation, both natural and man-made. Are you concerned? Why or why not?