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B1 Intermediate English 6:16 Educational

Fusion Power Explained – Future or Failure

Kurzgesagt · 14,925,186 views · Added 1 month ago

Learning Stats

B1

CEFR Level

5/10

Difficulty

Subtitles (116 segments)

00:01

The fundamental currency of our universe is energy.

00:05

It lights our homes, grows our food, powers our computers.

00:10

We can get it lots of ways:

00:12

Burning fossil fuels, splitting atoms,

00:14

or sunlight striking photovoltaics.

00:17

But there's a downside to everything

00:19

Fossil fuels are extremely toxic,

00:22

Nuclear waste is... well, nuclear waste,

00:25

And, there are not enough batteries to store sunlight for cloudy days yet.

00:28

And yet the sun seems to have virtually limitless free energy.

00:34

Is there a way we could build a sun on Earth?

00:37

Can we bottle a star?

00:42

[Intro Jingle]

00:49

The sun shines because of nuclear fusion.

00:51

In a nutshell, fusion is a thermonuclear process.

00:55

Meaning that the ingredients have to be incredibly hot.

00:57

So hot, that the atoms are stripped of their electrons

01:00

Making a plasma where nuclei and electrons bounce around freely.

01:05

Since nuclei are all positively charged,

01:08

They repel each other.

01:10

In order to overcome this repulsion,

01:11

The particles have to be going very, very fast

01:14

In this context, very fast means "very hot"

01:18

Millions of degrees

Full subtitles available in the video player

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