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Whether at school or at the office, the times that you need your brain at its sharpest are
inevitably spent in cramped, crowded spaces, where air flow is…must keep brain awake...do the thing
Hey everybody, this is Matt Lieberman filling in for DNews.
Researchers and civilians alike have long been aware of the harmful effects of high levels of carbon dioxide on the brain.
For example, an environment where the air contains 100,000 parts per million of CO2 can render an adult unconscious.
But few had considered what low amounts of carbon dioxide could do to the human brain.
It turns out, even levels as low as 1,000 parts per million can reduce the brain’s ability to focus and function properly.

And considering that we produce carbon dioxide everytime we exhale, that’s a big old problem.
The longer we stay in an unventilated space, especially with multiple people,
the higher the concentration of carbon dioxide in the atmosphere.
Now, researchers at the Lawrence Berkeley National Laboratory drew inspiration from a 2012 study in Budapest,
the first on record to examine the negative effects of small environments with CO2 levels of 3000 parts per million.
Now, the prevailing theories in the field of human concentration
were focused exclusively on the effects of volatile organic compounds, or VOCs, on the human brain.
These are gases emitted from building materials and personal care products found in a work environment.
However, they never accounted for the level of carbon dioxide that can build up in a crowded space over time.
So what’s a researcher with a scientific get to do?
Give it a good, long scratch with a sweet little study.
Check this out: Berkeley’s William Fisk collaborated with SUNY Upstate Medical University’s Usha Satish
to see how well a small group of participants -- 22 to be exact --
could perform a test called the Strategic Management Simulation in an environment
containing 600, 1000, and then 2500 parts per million of CO2.
What is the Strategic Management Simulation?
It’s a series of hypothetical scenarios that participants must develop strategic responses for.
Think Dungeons and Dragons without the dungeons,dragons, or dice. Or sword of magic.
Participants in the SMS were then graded on nine different criteria,
ranging from Focus, Initiative, Information Usage, and Basic Strategy.
The results are striking, to say the least.
The impact of CO2 at 2500 parts per million on the human brain
is the equivalent of a blood alcohol level of 0.08,
the legal limit to drive in the majority of the US.
So how common are environments containing 2500 parts per million or more of CO2?
Well, Fisk told Vox.com that the majority of offices are below 1000 parts per million,
but a crowded conference room can easily exceed the 2500 threshold in the span of 30 minutes.
But of course these findings need to be replicated on a larger scale to be authenticated.
Until then, however, let’s all crack a collective window, shall we?
So what do you think about the effects of Carbon Dioxide on the brain?
Let us know down in the comments below. I’m Matt Lieberman filling in for DNews.
You can find more of my videos over at SourceFed and SourceFedNERD.
Please like the video and subscribe to the channel. Thanks for watching.



上班上課總是讓你昏昏欲睡嗎?不是你的錯!How Classrooms Slow Your Brain Down

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Gisele Sung 發佈於 2015 年 2 月 24 日    Gisele Sung 翻譯    林曉玉 審核



build up1:27
build up 除了影片中「增加、提升」的意思外,還有吹捧某人的意思。
E.g., For weeks the mass media has been building up this new singer.

當然, build-up 也可以做名詞用:
E.g., The build-up of war made the whole country become a chaos.
戰爭的 擴大 讓整個國家陷入了混亂。
E.g., Before the concert, this band made a lot of build-up.
在演唱會前,這個樂團做了很多 宣傳
E.g., We need to do some build-up before the music festival coming.

scratch 是「搔、抓癢」,在影片中的 give it a scratch 跟 give it a try 的意思相似,都有試試看的意思。

scratch your head: 埋頭苦思
scratch beneath the surface: 透過表面觀察事物
from scratch: 從零開始
up to scratch: 達到標準


生活小常識!為什麼抓癢會越抓越癢呢?Why Scratching An Itch Makes It Worse

Dungeons and Dragons2:02

crack a collective window2:48
crack 是「使...破裂」的意思,crack a collective window 是指把窗戶全部打破,也有「解開所有迷團;打破屏障」的意思。
E.g., Finally, the team cracked a colletive window and know the answer.

其他和 crack 有關的片語:
crack the whip: 威逼;施壓
get cracking: 趕快行動
at the crack of the dawn: 在破曉時分
the fair crack of the whip: 平等的機會
a hard nut to crack: 棘手的問題


破解保險箱吧,費曼先生! (Safe Cracking with Feynman - Numberphile)






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