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How To Terraform Venus (Quickly)

Kurzgesagt – In a Nutshell

22M views 5 years ago

Warm-up Questions

What does “terraform” mean, and why might someone want to terraform Venus?
The title says “quickly.” What do you think “quickly” could mean when talking about changing an entire planet?
Would you rather humans try to live on Mars or Venus? Why?

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How To Terraform Venus (Quickly)

Why Venus, and what makes it so deadly? (00:00 – 02:25)

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1. What is given as the main reason Venus is so hot?

An extreme greenhouse effect caused by its atmosphere
Venus is closer to the Sun than Mercury
A lack of clouds to reflect sunlight
Constant volcanic eruptions on the surface

2. How does the speaker describe the pressure on Venus’ surface?

Like being about 900 meters deep in the ocean
Like being inside a hurricane
Like being 90 meters deep in the ocean
Similar to standing on Earth at sea level

3. According to the speaker, why is Venus attractive for long-term human settlement?

It is almost as big as Earth and has similar surface gravity
It already has breathable air
It has stronger gravity than Earth
It has low gravity that makes space travel easier

How To Terraform Venus (Quickly)

Cooling Venus: removing or freezing the atmosphere (02:25 – 06:23)

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1. Why is using lasers to blast Venus’ atmosphere into space presented as unrealistic?

Lasers cannot work in space
Venus rotates too fast to target it
It would require enormous power and still take thousands of years
The atmosphere is mostly oxygen, which can’t be blasted away

2. What is the basic idea of putting Venus “in the shade”?

Build underground cities that block sunlight
Release dust into the atmosphere to create clouds
Move Venus farther from the Sun
Construct mirrors/foil to blot out the Sun and freeze the atmosphere

3. What happens when Venus cools to around 31°C in this plan?

The atmosphere becomes thinner than Earth’s immediately
Oxygen begins to appear naturally
CO2 turns to liquid and a massive global rainstorm begins
The oceans boil away

How To Terraform Venus (Quickly)

Water, life, and a breathable atmosphere (06:23 – 12:42)

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1. Where does the speaker suggest getting large amounts of water for Venus?

From Ice-Moons such as Europa
By chemically creating water from CO2
From comets only
From Mars’ polar caps

2. Why can’t they simply remove the giant shading mirror and let the Sun in?

Because mirrors cannot be moved once built
Because a Venus day is extremely long and half the planet would overheat
Because Venus has no atmosphere left to hold heat
Because Venus would become too cold permanently

3. Which organisms are described as likely first inhabitants to help create oxygen?

Fungi
Cyanobacteria
Insects
Mosses

How To Terraform Venus (Quickly)

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1. What is the overall sequence of the terraforming plan described in the video?

Add animals first, then create water, then cool the planet
Warm Venus first, then remove CO2 later
Build cities in the clouds permanently and ignore the surface
Cool and reduce the atmosphere, add water, then rebuild a breathable biosphere

2. Which challenge is presented as the core problem at the beginning of terraforming Venus?

Finding metals to build underground cities
Cooling the planet and removing or locking away the massive CO2 atmosphere
Too much water already exists on Venus
Too little sunlight reaches Venus

3. What is the speaker’s final attitude toward terraforming Venus?

It is easy and can be done in a few years
It is possible but requires many things to go right and advanced technology
It will happen automatically without human effort
It is impossible in principle

Discussion Questions

Discuss the ideas from this video

How To Terraform Venus (Quickly)

Which terraforming method in the video seems most realistic, and which seems the most unrealistic? Explain your reasoning.
The plan takes thousands of years. Do you think humans should start projects that won’t be finished within many lifetimes? Why or why not?
What ethical or environmental risks could happen when changing an entire planet (for example, the “timebomb” problem mentioned)?
If a terraformed Venus became livable, what rules or priorities should guide how humans build cities and protect ecosystems there?