Name: 這是你的大腦在陳舊的空氣 (This Is Your Brain On Stale Air)
Uploaded: 2021-01-14T10:36:33.000Z
Duration: 5 min 51 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

if you are good at empathising with other people,

情態助動詞 B1

this week's guest video may make you feel short of breath.

With that out of the way, let me introduce you to Kurtis Baute,

filming from inside his homemade, airtight biodome.

Just over eight hours ago, I sealed myself inside of this cube.

I'm gonna try to make this as short and sweet as I can

because with every breath that I take I am exhaling carbon dioxide,

Right now, it's at 6,370 parts per million.

But to explain what that really means, I'm gonna have to step back a second.

Okay, I built this airtight, plant-filled biodome

about how we interact with the air we breathe.

including oxygen and carbon dioxide sensors

and other gases and backups and blood monitors

to when carbon dioxide levels in our atmosphere

Modern day, because of industrialization and burning fossil fuels,

those levels are now around 400 parts per million

And in urban environments, it's more like 500 parts per million.

But the thing is, we spend most of our time indoors,

and that's often in poorly-ventilated spaces

where the carbon dioxide levels can reach 1,000 parts per million.

And what's important here is that researchers have gone out

and tested the higher-order decision-making abilities

of office employees at different levels of carbon dioxide,

and they found that at 1,000 parts per million,

there is a 15% decrease in cognitive function.

That's a big deal because we spend a lot of our time

and they found that in over 50% of those classrooms,

the carbon dioxide levels went above 1,000 parts per million.

In those same studies, they found that when levels reached 1,400,

there was a 50% decrease in cognitive function.

there are all sorts of side effects, [laughing]

which I am feeling a lot of, including nausea,

Some people report headaches, sleepiness, poor concentration, loss of attention,

in- increased heart rate, and slight nausea.

Carbon dioxide levels in bedrooms and cars frequently reach 4,000 parts per million,

and those are places that we spend a lot of our time in.

We used to use carbon dioxide as an indicator for when air was stale,

but it's actually probably the most important part

It's 6,500 parts per million in here right now

It is making me do way more takes in this video than I would've hoped.

you're not supposed to work an eight-hour day

because it's probably bad for your long-term health.

You wouldn't want to be riding a motorcycle

with that much carbon dioxide around you, but

for motorcycle helmets to have carbon dioxide levels that are that high.

And I cannot imagine being impaired at this level

Still, we have to go up quite a bit. We have to go all the way up to 30,000

before levels become extremely dangerous and potentially deadly.

Now, I have some bad news and I have some good news.

The bad news is that carbon dioxide levels are going to go up.

They might even reach 695 parts per million by the end of the century.

we could end up with something like a 10%

or a 16% decrease in our cognitive function as a species,

The good news is that we have the ability right now

to change the environments that we live in,

and in terms of the stale air spaces that we inhabit.

So, you can go out and open a window in your office.

your air ventilation systems are up-to-date and functioning,

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這是你的大腦在陳舊的空氣 (This Is Your Brain On Stale Air)

cognitive

extremely

recommend

potentially