Air quality engineer here (yup, we exist): 1: This instrument is probably crap. Using this kind of instrument is like saying "it's between 0 and 50". A real instrument (used by France or the US EPA) is roughly the size of a small fridge and costs between 20-40k $. A state of the art one costs 400k $. They also take dayyys to calibrate and get working, need stable conditions, etc... 2: Yes, there's no way the PM2.5 was at 5 µg/m3 near that highway 3: BUT the most important thing, you guys measured the "instant" concentration. You pulled the instrument out and measured. But PM10 or PM2.5 are measured on year or day average. Let's say your instrument is decent, you'd have to let it run for at least a day (outside or in the office) without moving it and in stable conditions and see what the daily average is. The World Health Organization recommends that PM2.5 doesn't exceed 10 µg/m3... on a year average (25 µg/m3 daily average). 4: Nico, you're right, LA's air right now is probably way better than it was a few decades ago. You're also right about the instrument being a particle reader and ignoring all the rest. 5: Sam, what you're smelling is mostly gases (from car exhausts) so yeah, technically the instrument reading particles could say "hey, the air is fine" but your nose can smell all the gases the instrument can not read. That being said, gases and particles are often emitted together (in combustion engines for instance). I'm french and, in school, we often used LA as a bad example: you got a massive city, spreading across a huge surface, with shit public transport, in a hot environment (almost a desert), with mountains all around you blocking the air flow. Not sure who's in charge of measuring the air quality in each state but I would "blindly" trust any decent organization measuring it in the US (EPA, universities, labs). As far as I know, your government doesn't interfere with this, no matter who's in charge (Obama, Trump). It's just guys like you and me doing their jobs. Locking yourself up in a confined space is the worst you can do. Inside air quality if often worse than outside because of poor air recycling, although the pollutants aren't the same. What you could get is a CO2 analyzer (cheap and reliable) and put it your back office. Because CO2 is "harmless" but does cause headaches, sleepiness and loss of focusing abilities. Sorry for poor english, I'm French!

"they're just PRETENDING to play hacky sack" *hacky sack flies over computer screens*

Jokes on you, I stopped breathing 5 years ago.

“Everyone hold it in” Wren is great.

1st: Can you trust your city's water? 2nd: Can you trust your city's air? 3rd: Can you trust your city?

It's smells like "subscribe" Oh man that got me

“Not being able to breath sucks” Wes 2019

China: dammit our air is in the danger zone Chinese Government: just raise the danger standards so then it looks like we are fine

You guys need to measure when you're 3D printing. A recent study just showed that they release a bunch of ultrafine particles (UFP) and volatile organic chemicals (VOC). Those things are carcinogens, in the studio you should be fine because there's a lot of volume but it's bad when you stand next to the printer. PLA is the best and ABS is the worst. Everyone who has a printer needs to know it's better not to hang around a printer when it's printing

“Air quality is subjective” - RIP quotes 2019

Corridor crew: **freaking out about China's air quality** Me(who comes from Hong Kong): hehehe you have no idea. **looks behind me at my school issued dusk/gas mask**

CCrew: "Should you trust your city's air" Me: "Good thing I brought my mountain air with me"

"DO NOT Go onto roof for any reason except emergency" Corridor, Corridor Crew, and Node all start sweating.

I recommend doing a oxygen percent test. That is when ventilation changes the outcome

How does Niko manage to be so friendly yet terrifying?

They should do it again, after COVID restrictions

Next 2 videos: Can you trust your city’s Fire? Can you trust your city’s Earth?

Corridor Crew: Can you trust your city's air? Me live in indonesia with literal silent hill smoke fog: *OH YEAH 100%*

This entire video is basically Niko scolding Jake and Sam for not babysitting the kids. I’m here for it.

We got Water, we got Air, now.. Can you trust your cities Earth? Can you trust your cities Fire? Can you trust the Avatar?

I’m always open to channels changing their content over time as that’s natural and art changes and grows. Seeing the vfx artists react and singular deep dives have been nice, but it was so nice to see the little asides like wren’s heeleys again. ❤️

Jake's face has been on camera for more than a minute and there's no ad showing 😱😱😱 IMPOSTER who is he and what did he do to the real Jake

"You ever think about the air quality?" *mentions asthma* Me: I feel you bro.

I've lived in LA all my life. 15-20 years ago I'd walk to school basically everyday. About a two mile journey. My nose and throat would actually burn from being exposed to the open air for those trips, and it'd be way worse if I were running. My area was especially bad, being near a freeway and a massive gasoline factory thingy. Nowadays, I can pretty much inhale all the street juice air I want and I don't get that same burning feeling. There's definitely been a decent improvement.

I live in Singapore, where the Indonesia Fire Haze has been heavily impacted our city, hospitalizing many. Thank you for making a video to help spread awareness of air quality!

“Street Juice” ~ Jake Watson (October 4, 2019)

3:35 in LA and SF you breath fecies with some air in it xD While you walk on fecies filled with used needles xD

Nobody: Politicians: *The air seems less airer than before*

Jake: "We've been making videos for 10 years" MKBHD: "So I've been making Corridor videos for 15 years"

Air purifiers usually give off a lot of ozone, that “neutral” smell is the smell of ozone

Lol had to check the date of the video after Jake said the Bengals wouldn't win the superbowl. Literally just watched them lose the superbowl today.

Corridor crew normally: Corridor Crew when testing the air: i CaNt BreAtHe Corridor crew when testing water: I cAnT dRiNk ThIs

Next up, should you trust your city?

"It's like betting on the Bengals to win the Super Bowl this year" *sad Bengal face*

I'm been watching since the beginning, this is one of the best videos in comedy/timing/social relevance. You dudes have been crushing it lately. Glad you're finally getting the recognition you deserve

This has actually been incredibly educational. My son and I have been watching your videos and your approach to figuring things out has really made him more curious about the world.

As a Chinese who usually live in Beijing, I confirm: it's really bad. Actually it was even far worse 2 year or so ago, when we constantly had PM2.5 readings above 500 in winter.

77 would have me sweating in the clothes theyre wearing... actually in general.. A cool 65-68 is the only way

I love it when you folks swear. It always makes me remember when you folks recorded those ... "Bleeps" I think you Niko was on the roof and could hear Sam making horrid noises and probably knew what it was because he probably knows what Sam is doing most the time and vise-Versa, but it was still hilarious.

In Beijing with a dedicated air filter running 24/7. Back when my dorm room was halfway in the ground and close to the street, I could literally vacuum dust off the filter every 2 weeks. PM2.5 readings on the machine aren't typically high, but on days when it's bad (which are surprisingly rare), sitting in a classroom there is a noticeable haze between you and the blackboard

“Should Your City’s Air Trust You?”

"50 seconds ago" hmm

You guys seem to genuinly like this job and eachother. I want this someday

I definitely need more City Videos, especially videos with Sector 4, this is Real and Comical at the Same Time and I love it.

How wren eat a whole slice a lime with a straight face...

corridor: *breathing air for (10) years* also corridor: the air is not safe

Loving these OG style Corridor Crew videos. Miss this kind of stuff.

I watch your videos while i read my business textbooks and you teach me more. Love what you guys do!

1:33 25 Celcius? Holy cow, are you trying to melt? Give me 19 or bust. (66)

Me: *Lends 5$ to my Citys air* My City Air: _"Im gonna pull a sneaky one on ya."_

Love your channel ! Could you make a video comparing "bad & good CGI in popular music videos"?

3:35 Wren and Clint sometimes remind me of Hermann and Newt from Pacific Rim.

“38.6” “115.9” “310!!!!!” *looks at camera nervously* “i don’t know what this means”

Me: laughing in China.

4:28 I've seen those buildings in GTA 5

Anyone watching in 2022 when the bengals are now in the super bowl?

I've been watching your TTT stuff on Node all day, you guys should do more of that shit x P.s congrats on the baby graduating Niko bro

1:04 IT’S MONTY PYTHON AND THE HOLY GRAIL

I have asthma as well, only recently got it from the horrible air quality from my old job. It's amazing how much more I notice what's in the air especially when its negative.

8:54 : (adds in a bit of pepper) I'm even altering ingredients sometimes, just based off my own experience.

For some reason I read the title as “should you trust your crusty air?”

Damn he really had to attack my bengals like that

Straight up, I wish I could get hired onto the Corridor Crew. I'd love to edit all the audio you guys have to offer

The Indonesian forest fires in September 2019 were so bad that the sky turned red like on Mars.

I'm a 30 year old man with heeleys! *crashes into table*

Me literally almost dying here in Mongolian air Them:

I want to know more about You monster and Planet hopping please 2:40

This is actually perfect timing for me. I live about 40 miles east from you guys and I’ve been getting high AQI alerts in our city for the past few months (warm weather spikes it) and I’ve been thinking about getting one of those machines to test it in our town. I’m worried about my children growing up in terrible air quality. Now I wonder if these AQI reports are even accurate. Do you recommend the machine you used or another one to test it? Hopefully something not too expensive...

The look of disappointment on Sam's and Jake's faces is immeasurable

Has anyone ever compared Niko to Danny Rand from Iron Fist before?? Can’t stop seeing the same person

That sound effect at 9:54 messed with my head. Ha ha ha ha!

Your A/C is a mini split system which is a ductless sustem. Really it's reusing the air in the room already and chilling it. What you should consider is a UV Light, but you would need an air duct system to have an actual effect. Most UV Lights are cheap but don't last as long. The more expensive UV Lights last longer and have a better warranty. I recommend Respicaire. If your consider following this clean air plan. Good luck fellas!

Now we need a “Should you trust your cities concrete?” To have 3 states of matter.

'Do not go onto roof for any reason except emergency'

I really missed this kind of video. The reacts are cool and all, but these vlogs are why I subscribed to corridor crew

0:30 Foreshadowing when Wren shot Niko on the new vid

“Mmm, that fresh, fresh, weed air.”

"I thought we were an autonomous collective"

3:24 "How often do you think about the air that you breathe?" "Sorry, I barely think about breathing so..."

Should you trust Niko, is the question. He already goes into it, believing everything is good. Which is the first red flag for science.

Guys this is such a fascinating thing to test, would love it if you could test other facets of air quality!

Where I'm from the sky is CGI and the air just a special effect so I'm good

The product of the Air Conditioner Corridor is using are Gree, Midway, I got an ad from, non other than, GREE

You talked about the backroom having no ventilation and being smaller, but the way that will matter most is CO2 concentration. Also, judging from the difference between inside and outside, I think you have disproved the hypothesis that particulate pollution is an indicator of chemical pollution. I would love to see you try it with a few different chemical readings!

Wren just eating limes whole, nothing strange going on here.

Wren: **gasps** THE PM10 IS ABOUT TO BREAK 100

He's right, when i was a kid i remember seeing a brown haze over all of downtown LA.

i love that niko is back!

Grateful that I've never even had the thought to ask this question

First it was “Can you trust a city’s tap water?” Now it’s “Can you trust a city’s air?” Then it’ll be “Can you trust a city’s government?”

I can imagine all the equipment kicks up a lot of particulate

There are some small tunnels in Manhattan that are so caked with brake dust that the walls look like they're powder coated. They have escape hatches in some of them so you can escape lol

9:54 That legit scared me...Don't ask me I don't know why.

When the Northern California Camp fire was going strong where I am the air quality was rated #1 worse in the world. Had throat problems for 2 months afterwards. Glad I don't work for Cal Fire anymore. Honestly your readings are far from bad. I wouldn't worry about it at all.

In my home town we have a few detectors around the city and you can see the measure by using the app it’s called “Nebo” (basically “Sky” in Russian, cause this app was made by the guy who lives in Krasnoyarsk). Note: Krasnoyarsk is a pretty big city (>1mil people) lots of cars, metal plants and awful winter where our river Enisey does’t freeze at all. And imagine the amount of air pollution from plants, cars, river and really cold temperature (-30-40C). And if you use this app you can get something between 100 and 400 (2,5PM).

5:06 Man, if you ever re-release those hats, I'm in in a flash!

As someone who's lived in Beijing, I can tell you this: if the sky is blue, it's fine. I used to joke that Beijing was "once in a blue sky" rather than "once in a blue moon"

Imagine being in New Delhi, which is called gas chamber by its own people, and breathing for one day in Delhi is equal to damage done by smoking 20 cigarettes...

12:55 money shot of the whole vid man 😂💀 seeing Christian's face slowly blow up

I am currently living in Malaysia and we just had 2 weeks of haze. API got to 200 (I forgot the unit of measurement) on the worst day and visibility was only about 2km max. We had to wear masks when we go outside because breathing outside air is like...breathing in straight up smoke. Schools closed down. In the Indonesian towns where they were very close to where the forest fires were, API was 300-400. Couldn't see past a few metres. Now, it's gone down to the 60s level, which is considered perfectly fine. Again, I think you guys and the Malaysian government are measuring different things but yeah, went through that. Meanwhile, Jakarta, where I'm from, just straight up has it's own haze going on, the constant smog. A few months ago, it was named most polluted city in the world. It's pretty bad.